JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank

done General Characteristics Total Questions - 241

• question_answer1)
  The number of unpaired electrons in \[C{{r}^{+}}\] will be
  A)
  3 done clear
  B)
  4 done clear
  C)
  5 done clear
  D)
  6 done clear
  View Solution play_arrow

• question_answer2)
  The highest oxidation state of \[Cr\] will be
  A)
  2 done clear
  B)
  3 done clear
  C)
  4 done clear
  D)
  6 done clear
  View Solution play_arrow

• question_answer3)
  Which statement is true about the transitional elements [MP PMT 1995]
  A)
  They are highly reactive done clear
  B)
  They show variable oxidation states done clear
  C)
  They have low M.P. done clear
  D)
  They are highly electropositive done clear
  View Solution play_arrow

• question_answer4)
  The transitional metal which form green compound in +3 oxidation state and yellow orange compound in +6 oxidation state is
  A)
  \[Fe\] done clear
  B)
  \[Ni\] done clear
  C)
  \[Cr\] done clear
  D)
  \[Co\] done clear
  View Solution play_arrow

• question_answer5)
  Highest (+7) oxidation state is shown by [MP PMT 1990, 2001; RPMT 1999; AIIMS 1999; JIPMER 2001; CBSE PMT 1994, 2002; MP PET 1989, 2003]
  A)
  \[Co\] done clear
  B)
  \[Cr\] done clear
  C)
  \[V\] done clear
  D)
  \[Mn\] done clear
  View Solution play_arrow

• question_answer6)
  Transitional elements are
  A)
  All metals done clear
  B)
  Few metals and few non-metals done clear
  C)
  All solids done clear
  D)
  All highly reactive done clear
  View Solution play_arrow

• question_answer7)
  Which of the following has highest ionic radii [MP PMT 1990]
  A)
  \[C{{r}^{+3}}\] done clear
  B)
  \[M{{n}^{+3}}\] done clear
  C)
  \[F{{e}^{+3}}\] done clear
  D)
  \[C{{o}^{+3}}\] done clear
  View Solution play_arrow

• question_answer8)
  In a reaction the ferrous \[(F{{e}^{++}})\] iron is oxidised to ferric \[(F{{e}^{+++}})\] ion. The equivalent weight of the ion in the above reaction is equal to [CPMT 1985]
  A)
  Half of the atomic weight done clear
  B)
  1/5 of the atomic weight done clear
  C)
  The atomic weight done clear
  D)
  Twice the atomic weight done clear
  View Solution play_arrow

• question_answer9)
  Which of the following element has maximum density
  A)
  \[Hg\] done clear
  B)
  \[Au\] done clear
  C)
  \[Os\] done clear
  D)
  \[Pb\] done clear
  View Solution play_arrow

• question_answer10)
  Which is heaviest among the following [CPMT 1986]
  A)
  Iron done clear
  B)
  Copper done clear
  C)
  Gold done clear
  D)
  Silver done clear
  View Solution play_arrow

• question_answer11)
  Transitional elements exhibit variable valencies because they release electrons from the following orbits [MP PET/PMT 1988; MP PET 1989;UPSEAT 2001]
  A)
  ns orbit done clear
  B)
  ns and np orbits done clear
  C)
  (n - 1)d and ns orbits done clear
  D)
  (n - 1)d orbit done clear
  View Solution play_arrow

• question_answer12)
  The tendency towards complex formation is maximum in
  A)
  s - block elements done clear
  B)
  p - block elements done clear
  C)
  d - block elements done clear
  D)
  f - block elements done clear
  View Solution play_arrow

• question_answer13)
  Which forms coloured salts [CPMT 1984; MP PET 1995]
  A)
  Metals done clear
  B)
  Non-metals done clear
  C)
  p - block elements done clear
  D)
  Transitional elements done clear
  View Solution play_arrow

• question_answer14)
  Which element belongs to d - block [CPMT 1984]
  A)
  \[Na\] done clear
  B)
  \[Ca\] done clear
  C)
  \[Cu\] done clear
  D)
  \[Ar\] done clear
  View Solution play_arrow

• question_answer15)
  Variable valency is shown by [MP PMT 1986; AMU 1999]
  A)
  \[Na\] done clear
  B)
  \[Cu\] done clear
  C)
  \[Mg\] done clear
  D)
  \[Al\] done clear
  View Solution play_arrow

• question_answer16)
  The element with a atomic number 26 is [CPMT 1972]
  A)
  A non-metal done clear
  B)
  Krypton done clear
  C)
  Iron done clear
  D)
  Manganese done clear
  View Solution play_arrow

• question_answer17)
  One of the following metals forms a volatile carbonyl compound and this property is taken advantage of for its extraction. This metal is [NCERT 1984]
  A)
  Iron done clear
  B)
  Nickel done clear
  C)
  Cobalt done clear
  D)
  Tungston done clear
  View Solution play_arrow

• question_answer18)
  The coinage metals are
  A)
  Iron, Cobalt, Nickel done clear
  B)
  Copper and Zinc done clear
  C)
  Copper, Silver and Gold done clear
  D)
  Gold and Platinum done clear
  View Solution play_arrow

• question_answer19)
  Which of the following structure is that of a coinage metal [CPMT 1973, 86]
  A)
  2, 8, 1 done clear
  B)
  2, 8, 18, 1 done clear
  C)
  2, 8, 8 done clear
  D)
  2, 18, 8, 3 done clear
  View Solution play_arrow

• question_answer20)
  An elements in+3 oxidation state has the electronic configuration\[(Ar)3{{d}^{3}}\]. Its atomic number is [JIPMER 2002]
  A)
  24 done clear
  B)
  23 done clear
  C)
  22 done clear
  D)
  21 done clear
  View Solution play_arrow

• question_answer21)
  The catalytic activity of the transition metals and their compounds is ascribed to their [Kerala (Engg.) 2002]
  A)
  Chemical reactivity done clear
  B)
  Magnetic behaviour done clear
  C)
  Unfilled d-orbitals done clear
  D)
  Ability to adopt multiple oxidation states and their complexing ability done clear
  View Solution play_arrow

• question_answer22)
  What is the general electronic configuration for 2nd row transition series [Orrisa JEE 2002]
  A)
  \[[Ne]3{{d}^{1-10}},4{{s}^{2}}\] done clear
  B)
  \[[Ar]3{{d}^{1-10}},4{{s}^{1-2}}\] done clear
  C)
  \[[Kr]4{{d}^{1-10}},\,\,5{{s}^{1-2}}\] done clear
  D)
  \[[Xe]5{{d}^{1-10}},\,\,5{{s}^{1-2}}\] done clear
  View Solution play_arrow

• question_answer23)
  Transitional elements are named transition elements because their characters are
  A)
  In between s and p - block elements done clear
  B)
  Like that of p and d - block elements done clear
  C)
  They are members of I - A group done clear
  D)
  They are like inactive elements done clear
  View Solution play_arrow

• question_answer24)
  Those elements whose two outermost orbitals are incompletely filled with electrons are
  A)
  p - block elements done clear
  B)
  s - block elements done clear
  C)
  Transitional elements done clear
  D)
  Both s and p - block elements done clear
  View Solution play_arrow

• question_answer25)
  Which ion has maximum magnetic moment [AIIMS 1983; MP PMT 1990]
  A)
  \[{{V}^{+3}}\] done clear
  B)
  \[M{{n}^{+3}}\] done clear
  C)
  \[F{{e}^{+3}}\] done clear
  D)
  \[C{{u}^{+2}}\] done clear
  View Solution play_arrow

• question_answer26)
  Which of the following transition metal is present in misch metal
  A)
  \[La\] done clear
  B)
  \[Sc\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Cr\] done clear
  View Solution play_arrow

• question_answer27)
  Which of the following statements is not true in regard to transition elements [EAMCET 1988, 89]
  A)
  They readily form complex compounds done clear
  B)
  They show variable valency done clear
  C)
  All their ions are colourless done clear
  D)
  Their ions contain partially filled d -electron levels done clear
  View Solution play_arrow

• question_answer28)
  Which of the following represents the electronic configuration of a transition element [EAMCET 1987]
  A)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{3}}\] done clear
  B)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}{{d}^{3}},(n+1){{s}^{2}}\] done clear
  C)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}{{d}^{10}},(n+1){{s}^{2}}{{p}^{1}}\] done clear
  D)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}}.......n{{s}^{2}}{{p}^{6}}\] done clear
  View Solution play_arrow

• question_answer29)
  The general electronic configuration of transition elements is [CPMT 1984, 90, 2002; CBSE PMT 1991, 96; AIIMS 2001; Pb. CET 2000; MP PMT 2003]
  A)
  \[(n-1){{d}^{1-5}}\] done clear
  B)
  \[(n-1){{d}^{1-10}}n{{s}^{1}}\] done clear
  C)
  \[(n-1){{d}^{1-10}}n{{s}^{1-2}}\] done clear
  D)
  \[n{{s}^{2}}(n-1){{d}^{10}}\] done clear
  View Solution play_arrow

• question_answer30)
  Transition elements are coloured [MP PMT 1986; Pb. CET 1989; RPET 1999]
  A)
  Due to small size done clear
  B)
  Due to metallic nature done clear
  C)
  Due to unpaired d - electrons done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer31)
  Which of the following has the maximum number of unpaired d-electrons [BIT 1992; CBSE PMT 1999]
  A)
  \[Zn\] done clear
  B)
  \[F{{e}^{2+}}\] done clear
  C)
  \[N{{i}^{3+}}\] done clear
  D)
  \[C{{u}^{+}}\] done clear
  View Solution play_arrow

• question_answer32)
  Which is not amphoteric [CPMT 1991]
  A)
  \[A{{l}^{3+}}\] done clear
  B)
  \[C{{r}^{3+}}\] done clear
  C)
  \[F{{e}^{3+}}\] done clear
  D)
  \[Z{{n}^{2+}}\] done clear
  View Solution play_arrow

• question_answer33)
  Which does not form amalgam [AFMC 1988; MP PET 2001]
  A)
  \[Fe\] done clear
  B)
  \[Co\] done clear
  C)
  \[Ag\] done clear
  D)
  \[Zn\] done clear
  View Solution play_arrow

• question_answer34)
  Transition metals are often paramagnetic owing to [Bihar CEE 1992]
  A)
  Their high M.P. and B.P. done clear
  B)
  The presence of vacant orbitals done clear
  C)
  The presence of one or more unpaired electrons in the system done clear
  D)
  Their being less electropositive than the elements of groups I-A and II-A done clear
  View Solution play_arrow

• question_answer35)
  Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are [NCERT 1973; MP PMT 2000]
  A)
  Metalloids done clear
  B)
  Transition elements done clear
  C)
  Non-metals done clear
  D)
  Gases done clear
  View Solution play_arrow

• question_answer36)
  Which of the following transition metal cation has maximum unpaired electrons [MP PET/PMT 1988; MP PMT 1991; RPMT 1997]
  A)
  \[M{{n}^{+2}}\] done clear
  B)
  \[F{{e}^{+2}}\] done clear
  C)
  \[C{{o}^{2+}}\] done clear
  D)
  \[N{{i}^{2+}}\] done clear
  View Solution play_arrow

• question_answer37)
  Maximum number of oxidation states of transition metal is derived from the following configuration [MP PET/PMT 1988]
  A)
  ns electron done clear
  B)
  \[(n-1)d\] electron done clear
  C)
  \[(n+1)d\] electron done clear
  D)
  \[ns+(n-1)d\] electron done clear
  View Solution play_arrow

• question_answer38)
  Which of the following statement is correct [MP PET/PMT 1988; MP PMT 1991]
  A)
  Iron belongs to 3rd transition series of the periodic table done clear
  B)
  Iron belongs to f-block of the periodic table done clear
  C)
  Iron belongs to second transition series of the periodic table done clear
  D)
  Iron belongs to group VIII of the periodic table done clear
  View Solution play_arrow

• question_answer39)
  Zinc does not show variable valency like d-block elements because [MP PET 1989; MP PMT 1992; CPMT 1984]
  A)
  It is a soft metal done clear
  B)
  d-orbital is complete done clear
  C)
  It is low melting done clear
  D)
  Two electrons are present in the outermost orbit done clear
  View Solution play_arrow

• question_answer40)
  Which of the following is a transitional element [MP PMT 1989; DPMT 1982]
  A)
  \[Al\] done clear
  B)
  \[As\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Rb\] done clear
  View Solution play_arrow

• question_answer41)
  Which is not true for transition elements
  A)
  They are all metals done clear
  B)
  They show variable valency done clear
  C)
  They form coloured ions done clear
  D)
  They do not form co-ordinate compounds done clear
  View Solution play_arrow

• question_answer42)
  The main reason for not using a mercury electrolytic cell in \[NaOH\] manufacture is that [CPMT 1988]
  A)
  \[Hg\] is toxic done clear
  B)
  \[Hg\] is a liquid done clear
  C)
  \[Hg\] has a high vapour pressure done clear
  D)
  \[Hg\] is a good conductor of electricity done clear
  View Solution play_arrow

• question_answer43)
  Lanthanum is grouped with f-block elements  because [AMU 2000]
  A)
  It has partially filled f -orbitals done clear
  B)
  It is just before Ce in the periodic table done clear
  C)
  It has both partially filled f and d-orbitals done clear
  D)
  The properties of Lanthanum are very similar to the elements of 4f block done clear
  View Solution play_arrow

• question_answer44)
  The element having electronic configuration belongs to \[n{{s}^{2}}(n-1){{d}^{1-10}}(n-2){{f}^{1-14}}\] [UPSEAT 2001]
  A)
  s-block done clear
  B)
  p-block done clear
  C)
  d-block done clear
  D)
  f-block done clear
  View Solution play_arrow

• question_answer45)
  Variable valency is shown by [UPSEAT 2001]
  A)
  Typical elements done clear
  B)
  Normal elements done clear
  C)
  Transition elements done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer46)
  Which ion is not coloured [DPMT 2001]
  A)
  \[C{{r}^{3+}}\] done clear
  B)
  \[C{{o}^{2+}}\] done clear
  C)
  \[C{{r}^{2+}}\] done clear
  D)
  \[C{{u}^{+}}\] done clear
  View Solution play_arrow

• question_answer47)
  The number of unpaired electrons in ferrous ion is [JIPMER (Med.) 2001]
  A)
  5 done clear
  B)
  4 done clear
  C)
  3 done clear
  D)
  2 done clear
  View Solution play_arrow

• question_answer48)
  \[Fe,\] \[Co\] and \[Ni\] have valuable catalytic properties in process involving
  A)
  Organic compound done clear
  B)
  Oxidation done clear
  C)
  Hydrogenation done clear
  D)
  Compounds of hydrogen done clear
  View Solution play_arrow

• question_answer49)
  Which of the following statement is not correct [NCERT 1983]
  A)
  Metals contribute their valency electrons to the common sea of electrons done clear
  B)
  Metals have high co-ordination number done clear
  C)
  Metals tend to adopt closely packed structures done clear
  D)
  Metals have high lattice energy done clear
  View Solution play_arrow

• question_answer50)
  Zinc, cadmium and mercury show the properties of
  A)
  Typical elements done clear
  B)
  Normal elements done clear
  C)
  Transitional elements done clear
  D)
  Rare elements done clear
  View Solution play_arrow

• question_answer51)
  Iron is
  A)
  A normal element done clear
  B)
  A typical element done clear
  C)
  A transitional element done clear
  D)
  An inert element done clear
  View Solution play_arrow

• question_answer52)
  Platinum, palladium, iridium etc., are called noble metals because [NCERT 1975; CPMT 1976]
  A)
  Alfred Noble discovered them done clear
  B)
  They are inert towards many common reagents done clear
  C)
  They are shining lustrous and pleasing to look at done clear
  D)
  They are found in active state done clear
  View Solution play_arrow

• question_answer53)
  Which of the following statement is not true about Mohr's salt [CPMT 1988]
  A)
  It decolourises \[KMn{{O}_{4}}\] done clear
  B)
  It is a primary standard done clear
  C)
  It is a double salt done clear
  D)
  Oxidation state of iron is +3 in this salt done clear
  View Solution play_arrow

• question_answer54)
  Which one of the following statement is true for transition elements [AIIMS 1983; AFMC 1987; JIPMER 1997]
  A)
  They exhibit diamagnetism done clear
  B)
  They exhibit  inert pair effect done clear
  C)
  They do not form alloys done clear
  D)
  They show variable oxidation states done clear
  View Solution play_arrow

• question_answer55)
  The valence shell electronic configuration of \[C{{r}^{2+}}\] ion is [Orissa JEE 2005]
  A)
  \[4{{s}^{o}}3{{d}^{4}}\] done clear
  B)
  \[4{{s}^{2}}3{{d}^{2}}\] done clear
  C)
  \[4{{s}^{2}}3{{d}^{0}}\] done clear
  D)
  \[3{{p}^{6}}4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer56)
  The hardness of \[Cr\] is due to ...... and metallic lusture is due to .......
  A)
  Covalent bond, metallic bond done clear
  B)
  Covalent bond, hydrogen bond done clear
  C)
  Metallic bond, covalent bond done clear
  D)
  Metallic bond, hydrogen bond done clear
  View Solution play_arrow

• question_answer57)
  In the first transition series, the highest B.P. and M.P. is of
  A)
  \[Cr\] done clear
  B)
  \[V\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Fe\] done clear
  View Solution play_arrow

• question_answer58)
  In the following transition elements, the lowest M.P. and B.P. is exhibited by
  A)
  \[Cr\] done clear
  B)
  \[Hg\] done clear
  C)
  \[Cu\] done clear
  D)
  \[Au\] done clear
  View Solution play_arrow

• question_answer59)
  In the following members of transition elements, the lowest ionization energy is of
  A)
  \[Ti\] done clear
  B)
  \[Sc\] done clear
  C)
  \[V\] done clear
  D)
  \[Mn\] done clear
  View Solution play_arrow

• question_answer60)
  Which of the following has second ionisation potential less than expected
  A)
  \[Cr\] done clear
  B)
  \[Zn\] done clear
  C)
  \[V\] done clear
  D)
  \[Mo\] done clear
  View Solution play_arrow

• question_answer61)
  A transition element \[X\] has a configuration \[\left[ Ar \right]3{{d}^{4}}\] in its + 3 oxidation state. Its atomic number is [CBSE PMT 1996]
  A)
  25 done clear
  B)
  26 done clear
  C)
  22 done clear
  D)
  19 done clear
  View Solution play_arrow

• question_answer62)
  The transition element have a characteristic electronic configuration which can be represented as [MP PMT/PET 1988; MP PMT 1989]
  A)
  \[(n-2){{s}^{2}}{{p}^{6}}{{d}^{1-10}}(n-1){{s}^{2}}{{p}^{6}}n{{s}^{2}}\] done clear
  B)
  \[(n-2){{s}^{2}}{{p}^{6}}{{d}^{1-10}}(n-1){{s}^{1}}{{p}^{6}}{{d}^{1}}\] or \[{{d}^{1}}n{{s}^{1}}\] done clear
  C)
  \[(n-1){{s}^{1}}{{p}^{6}}{{d}^{10}}n{{s}^{2}}{{p}^{6}}n{{d}^{1-10}}\] done clear
  D)
  \[(n-1){{s}^{2}}{{p}^{6}}{{d}^{1-10}}n{{s}^{1}}\] or \[n{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer63)
  Number of unpaired electrons in \[F{{e}^{+++}}(Z=26)\] is [MP PMT 1995; RPET 2003]
  A)
  4 done clear
  B)
  5 done clear
  C)
  6 done clear
  D)
  3 done clear
  View Solution play_arrow

• question_answer64)
  Of the ions \[Z{{n}^{2+}},\] \[N{{i}^{2+}}\] and \[C{{r}^{3+}}\][atomic number of \[Zn=30,\] \[Ni=28,\] \[Cr=24\]] [MP PET 1996]
  A)
  Only \[Z{{n}^{2+}}\] is colourless and \[N{{i}^{2+}}\] and \[C{{r}^{3+}}\] are coloured done clear
  B)
  All three are colourless done clear
  C)
  All three are coloured done clear
  D)
  Only \[N{{i}^{2+}}\] is coloured and \[Z{{n}^{2+}}\] and \[C{{r}^{3+}}\] are colourless done clear
  View Solution play_arrow

• question_answer65)
  Common oxidation state of scandium, a transition element is/are [atomic number of Sc = 21] [MP PET 1996]
  A)
  + 4 done clear
  B)
  + 1 done clear
  C)
  + 2 and + 3 done clear
  D)
  + 4 and +1 done clear
  View Solution play_arrow

• question_answer66)
  Which of the following is not correct about transition metals [MP PET 1996]
  A)
  Their melting and boiling points are high done clear
  B)
  Their compounds are generally coloured done clear
  C)
  They can form ionic or covalent compounds done clear
  D)
  They do not exhibit variable valency done clear
  View Solution play_arrow

• question_answer67)
  From +6 to +1 oxidation state is shown by the element of....... group
  A)
  V-B done clear
  B)
  VI-B done clear
  C)
  VII-B done clear
  D)
  VIII done clear
  View Solution play_arrow

• question_answer68)
  The electronic configuration of cobalt is
  A)
  \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}}.3{{s}^{2}}3{{p}^{6}}3{{d}^{1}},4{{s}^{2}}\] done clear
  B)
  \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{7}},4{{s}^{2}}\] done clear
  C)
  \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{3}},4{{s}^{2}}\] done clear
  D)
  \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer69)
  Out of all the known elements the number of transitional elements is
  A)
  80 done clear
  B)
  61 done clear
  C)
  43 done clear
  D)
  38 done clear
  View Solution play_arrow

• question_answer70)
  Cigarette or gas lighter is made up of
  A)
  Misch metal done clear
  B)
  Alkali metal done clear
  C)
  Noble metal done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer71)
  Bullet-proof steel alloy is prepared by using
  A)
  \[Sc\] done clear
  B)
  \[Ni\] done clear
  C)
  \[Zr\] done clear
  D)
  \[Zn\] done clear
  View Solution play_arrow

• question_answer72)
  In making gun-berrel, the steel used is
  A)
  \[Fe-Mn\] done clear
  B)
  \[Fe-Cr\] done clear
  C)
  \[Fe-W\] done clear
  D)
  \[Ni-Mo\] done clear
  View Solution play_arrow

• question_answer73)
  Neobium and tantalum metals are used in making surgical instruments because they are
  A)
  Non-corrosive done clear
  B)
  Hard done clear
  C)
  Soft done clear
  D)
  All done clear
  View Solution play_arrow

• question_answer74)
  To support tungstun filament in electric bulb, the steel used is
  A)
  \[Cr\] done clear
  B)
  \[Ni\] done clear
  C)
  \[Mn\] done clear
  D)
  \[Mo\] done clear
  View Solution play_arrow

• question_answer75)
  The elements belonging to the first  transition series have atomic number from
  A)
  19 to 37 done clear
  B)
  22 to 32 done clear
  C)
  24 to 30 done clear
  D)
  21 to 30 done clear
  View Solution play_arrow

• question_answer76)
  Which of the following elements does not belong to the first transition series [BHU 2000; MP PMT 1995]
  A)
  Fe done clear
  B)
  V done clear
  C)
  Ag done clear
  D)
  Cu done clear
  View Solution play_arrow

• question_answer77)
  \[F{{e}^{2+}}\] shows [RPET 2000]
  A)
  Ferromagnetism done clear
  B)
  Paramagnetism done clear
  C)
  Diamagnetism done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer78)
  Zinc and mercury do not show variable valency like d-block elements because [RPMT 2000; MP PMT 2000]
  A)
  They are soft done clear
  B)
  Their d- shells are complete done clear
  C)
  They have only two electrons in the outermost subshell done clear
  D)
  Their d-shells are incomplete done clear
  View Solution play_arrow

• question_answer79)
  Cuprous ion is colourless while cupric ion is coloured because [KCET 2000]
  A)
  Both have half filled p and d-orbitals done clear
  B)
  Cuprous ion has incomplete d-orbital and cupric ion has a complete d-orbital done clear
  C)
  Both have unpaired electrons in the d-orbitals done clear
  D)
  Cuprous ion has a complete d-orbital and cupric ion has an incomplete d-orbital done clear
  View Solution play_arrow

• question_answer80)
  Transition metals are related to which block [MP PMT 2003; CPMT 1991]
  A)
  s-block done clear
  B)
  p-block done clear
  C)
  d-block done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer81)
  The number of unpaired electrons in cobalt atom is (atomic number of Co = 27) [MP PMT 2003]
  A)
  2 done clear
  B)
  3 done clear
  C)
  4 done clear
  D)
  1 done clear
  View Solution play_arrow

• question_answer82)
  Zn is related to which group [MP PMT 2003]
  A)
  IIB done clear
  B)
  IIA done clear
  C)
  IA done clear
  D)
  IB done clear
  View Solution play_arrow

• question_answer83)
  Which of the following element does not show variable valency [MP PMT 2003]
  A)
  Ni done clear
  B)
  Zn done clear
  C)
  Cu done clear
  D)
  Mn done clear
  View Solution play_arrow

• question_answer84)
  Which of the following is diamagnetic transitional metal ion
  A)
  \[N{{i}^{+2}}\] done clear
  B)
  \[Z{{n}^{+2}}\] done clear
  C)
  \[C{{o}^{+2}}\] done clear
  D)
  \[C{{u}^{+2}}\] done clear
  View Solution play_arrow

• question_answer85)
  Which of the following is not an actinide [DPMT 2005]
  A)
  Curium done clear
  B)
  Californium done clear
  C)
  Uranium done clear
  D)
  Terbium done clear
  View Solution play_arrow

• question_answer86)
  The ability to form complex compounds by the transitional metal ion is due to
  A)
  Small size done clear
  B)
  Vacant \['d'\] orbitals done clear
  C)
  High nuclear charge done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer87)
  Which of the following will give green hydrated ion
  A)
  \[F{{e}^{+2}}\] done clear
  B)
  \[N{{i}^{+2}}\] done clear
  C)
  a and b both done clear
  D)
  \[{{V}^{+3}}\] done clear
  View Solution play_arrow

• question_answer88)
  Magnetic moment is expressed in
  A)
  Faraday done clear
  B)
  Calorie done clear
  C)
  Bohr Magneton done clear
  D)
  Debye done clear
  View Solution play_arrow

• question_answer89)
  If the colours of salts of transition elements are due to the presence of unpaired electrons in the transition metal ions, which of the following ions will be colourless in aqueous solution
  A)
  \[T{{i}^{3+}}\] done clear
  B)
  \[T{{i}^{4+}}\] done clear
  C)
  \[F{{e}^{2+}}\] done clear
  D)
  \[F{{e}^{3+}}\] (The at. no. of \[Ti\] and \[Fe\] are 22 and 26 respectively) done clear
  View Solution play_arrow

• question_answer90)
  In the periodic table first transition series is placed in
  A)
  Third period done clear
  B)
  Fourth period done clear
  C)
  Fifth period done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer91)
  The element having general electronic configuration \[3{{d}^{4}}4{{s}^{1}}\] is [BHU 1978; CPMT 1987]
  A)
  Noble gas done clear
  B)
  Non-metal done clear
  C)
  Metalloid done clear
  D)
  Transition metal done clear
  View Solution play_arrow

• question_answer92)
  Which of the following general configuration of outermost shell represents chromium element [Cr?s atomic number = 24] [CBSE PMT 1991; MP PMT 1992, 2001; RPET/PMT 1999]
  A)
  \[{{d}^{5}}{{s}^{1}}\] done clear
  B)
  \[{{d}^{6}}{{s}^{0}}\] done clear
  C)
  \[{{d}^{4}}{{s}^{2}}\] done clear
  D)
  \[{{d}^{3}}{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer93)
  Which element gives maximum balanced oxide [MP PMT 1990]
  A)
  \[V\] done clear
  B)
  \[Cr\] done clear
  C)
  \[Mn\] done clear
  D)
  \[Fe\] done clear
  View Solution play_arrow

• question_answer94)
  In first transition series, the melting point of \[Mn\] is low because [MP PMT/PET 1988]
  A)
  Due to \[{{d}^{10}}\] configuration, metallic bonds are strong done clear
  B)
  Due to \[{{d}^{7}}\] configuration, metallic bonds are weak done clear
  C)
  Due to \[{{d}^{5}}\] configuration, metallic bonds are weak done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer95)
  Which of the following ions has the least magnetic moment [MP PMT 1993]
  A)
  \[C{{u}^{+2}}\] done clear
  B)
  \[N{{i}^{+2}}\] done clear
  C)
  \[C{{o}^{+3}}\] done clear
  D)
  \[F{{e}^{+2}}\] done clear
  View Solution play_arrow

• question_answer96)
  Among the following outermost configurations of transition metals, which shows the highest oxidation state [MP PMT 1993; MP PET 1995, 2001]
  A)
  \[3{{d}^{3}}4{{s}^{2}}\] done clear
  B)
  \[3{{d}^{5}}4{{s}^{1}}\] done clear
  C)
  \[3{{d}^{5}}4{{s}^{2}}\] done clear
  D)
  \[3{{d}^{6}}4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer97)
  Which of the following is not true for transition metals [MP PET 1993]
  A)
  They are malleable and ductile done clear
  B)
  They have high boiling and melting points done clear
  C)
  They crystallize with body centred cubic and hexagonal close-packed structures only done clear
  D)
  They show variable oxidation states although not always done clear
  View Solution play_arrow

• question_answer98)
  The most malleable of all the metals is
  A)
  Silver done clear
  B)
  Sodium done clear
  C)
  Gold done clear
  D)
  Platinum done clear
  View Solution play_arrow

• question_answer99)
  Paramagnetism is exhibited by molecules [NCERT 1981; Manipal MEE 1995]
  A)
  Not attracted in a magnetic field done clear
  B)
  Containing only paired electrons done clear
  C)
  Carrying a positive charge done clear
  D)
  Carrying unpaired electrons done clear
  View Solution play_arrow

• question_answer100)
  The higher number of unpaired electrons are in [DCE 2001]
  A)
  \[Fe\] done clear
  B)
  \[F{{e}^{+}}\] done clear
  C)
  \[F{{e}^{+2}}\] done clear
  D)
  \[F{{e}^{+3}}\] done clear
  View Solution play_arrow

• question_answer101)
  Which one of the following statements concerning lanthanides elements is false [AMU 2001]
  A)
  Lanthanides are separated from one another by ion exchange methods done clear
  B)
  The ionic radii of trivalent lanthanides steadily increase with increase in atomic number done clear
  C)
  All lanthanides are highly dense metals done clear
  D)
  Most typical oxidation of lanthanides is \[+3\] done clear
  View Solution play_arrow

• question_answer102)
  Complex ion is shown by [CPMT 2001]
  A)
  \[Ag\] done clear
  B)
  \[Au\] done clear
  C)
  \[Cu\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer103)
  Which of the following transition metal is used as  a catalyst [CPMT 2001]
  A)
  Nickel done clear
  B)
  Cobalt done clear
  C)
  Gold done clear
  D)
  Both A and B done clear
  View Solution play_arrow

• question_answer104)
  For which of the following transition metal ion is shown highest magnetic moment having outer electronic configuration [MP PET 2003]
  A)
  \[3{{d}^{1}}\] done clear
  B)
  \[3{{d}^{8}}\] done clear
  C)
  \[3{{d}^{5}}\] done clear
  D)
  \[3{{d}^{7}}\] done clear
  View Solution play_arrow

• question_answer105)
  The number of unpaired electrons is maximum in (Atomic no.  : Ti = 22; V= 23; Cr = 24; Fe = 26) [MP PET 2003]
  A)
  Cr done clear
  B)
  Fe done clear
  C)
  V done clear
  D)
  Sc done clear
  View Solution play_arrow

• question_answer106)
  Europium is  [DPMT 2005]
  A)
  s-block element done clear
  B)
  p-block element done clear
  C)
  d-block element done clear
  D)
  f-block element done clear
  View Solution play_arrow

• question_answer107)
  Which of the following elements is alloyed with copper to form brass [MP PET 2003; MP PMT 2004]
  A)
  Lead done clear
  B)
  Silver done clear
  C)
  Zinc done clear
  D)
  Antimony done clear
  View Solution play_arrow

• question_answer108)
  In which of the following metallic bond is strongest [MP PET 2003]
  A)
  Fe done clear
  B)
  Sc done clear
  C)
  V done clear
  D)
  Cr done clear
  View Solution play_arrow

• question_answer109)
  Which of the following is a colourless ion [EAMCET 1992]
  A)
  \[C{{u}^{+2}}\] done clear
  B)
  \[F{{e}^{+3}}\] done clear
  C)
  \[T{{i}^{+3}}\] done clear
  D)
  \[Z{{n}^{+2}}\] done clear
  View Solution play_arrow

• question_answer110)
  The substance used in cancer therapy is [DPMT 2002]
  A)
  Rn done clear
  B)
  Ni done clear
  C)
  Fe done clear
  D)
  Co done clear
  View Solution play_arrow

• question_answer111)
  In solution of \[AgN{{O}_{3,}}\]if Cu is a solution become blue due to [MH CET 2002]
  A)
  Oxidation of Ag done clear
  B)
  Oxidation of Cu done clear
  C)
  Reduction of Ag done clear
  D)
  Reduction of Cu done clear
  View Solution play_arrow

• question_answer112)
  Lanthanide for which + II and + III oxidation states are common is [AIIMS 2003]
  A)
  La done clear
  B)
  Nd done clear
  C)
  Ce done clear
  D)
  Eu done clear
  View Solution play_arrow

• question_answer113)
  The number of unpaired electrons in \[Z{{n}^{++}}\] is
  A)
  2 done clear
  B)
  3 done clear
  C)
  4 done clear
  D)
  0 done clear
  View Solution play_arrow

• question_answer114)
  The first transition element is
  A)
  Chromium done clear
  B)
  Scandium done clear
  C)
  Nickel done clear
  D)
  Copper done clear
  View Solution play_arrow

• question_answer115)
  The electronic configuration (outermost) of \[M{{n}^{+2}}\] ion (atomic no. of \[Mn=25\]) in its ground state is [MP PET 1993; MP PMT 1994; AFMC 2002]
  A)
  \[3{{d}^{5}}4{{s}^{0}}\] done clear
  B)
  \[3{{d}^{4}}4{{s}^{1}}\] done clear
  C)
  \[3{{d}^{3}}4{{s}^{2}}\] done clear
  D)
  \[3{{d}^{2}}4{{s}^{2}}4{{p}^{2}}\] done clear
  View Solution play_arrow

• question_answer116)
  The highest magnetic moment is shown by the transition metal ion with the outer electronic configuration [MP PET 1993; MP PMT 1995; RPMT 1999]
  A)
  \[3{{d}^{2}}\] done clear
  B)
  \[3{{d}^{5}}\] done clear
  C)
  \[3{{d}^{7}}\] done clear
  D)
  \[3{{d}^{9}}\] done clear
  View Solution play_arrow

• question_answer117)
  Which has valency two
  A)
  \[Al\] done clear
  B)
  \[Rb\] done clear
  C)
  \[Cu\] done clear
  D)
  \[Ge\] done clear
  View Solution play_arrow

• question_answer118)
  All the following statements about the transitional elements are true except that [Kerala (Med.) 2003]
  A)
  All of the transitional elements are predominantly metallic done clear
  B)
  In aqueous solution many of their simple ions are coloured done clear
  C)
  Most of the transitional elements show pronounced catalytic activity done clear
  D)
  Most of the transitional elements show only one valence state done clear
  View Solution play_arrow

• question_answer119)
  Which of the following transition metals can have highest oxidation state [RPET 2003]
  A)
  \[Cr\] done clear
  B)
  Co done clear
  C)
  \[Ni\] done clear
  D)
  Cu done clear
  View Solution play_arrow

• question_answer120)
  Which of the following melts in boiling water [MNR 1984]
  A)
  Gun metal done clear
  B)
  Wood's metal done clear
  C)
  Monel metal done clear
  D)
  Bell metal done clear
  E)
  None of these done clear
  View Solution play_arrow

• question_answer121)
  On the basis of position in the electrochemical series, the metal which does not displace hydrogen from water and acid is
  A)
  \[Hg\] done clear
  B)
  \[Al\] done clear
  C)
  \[Pb\] done clear
  D)
  \[Ba\] done clear
  View Solution play_arrow

• question_answer122)
  The tendency of 3d-metal ions to form stable complexes is due to their [MP PMT 1997]
  A)
  Variable oxidation state done clear
  B)
  Strong electronegative nature done clear
  C)
  High charge/size ratio and vacant d-orbitals done clear
  D)
  Very low ionization energies done clear
  View Solution play_arrow

• question_answer123)
  The 3d-metal ions are paramagnetic in nature because [MP PMT 1997]
  A)
  They are reducing agents done clear
  B)
  They form coloured salts done clear
  C)
  They have one or more paired s-electrons done clear
  D)
  They have one or more unpaired d-electrons done clear
  View Solution play_arrow

• question_answer124)
  Lanthanide contraction occurs because [AMU 2000; BHU 2003]
  A)
  f-orbital electrons are easily lost done clear
  B)
  f-orbital an incompletely filled  done clear
  C)
  f-orbital electron an poor shielders of nuclear charge  done clear
  D)
  f-orbital do not come out on the surface of atom and are buried inside done clear
  View Solution play_arrow

• question_answer125)
  Which is most reactive metal [BHU 1979]
  A)
  \[Fe\] done clear
  B)
  \[Pt\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Co\] done clear
  View Solution play_arrow

• question_answer126)
  Least reactive metal is
  A)
  \[Fe\] done clear
  B)
  \[Os\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Pt\] done clear
  View Solution play_arrow

• question_answer127)
  Which occludes hydrogen
  A)
  \[Os\] done clear
  B)
  \[Pt\] done clear
  C)
  \[Ni\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer128)
  Which has the maximum ferromagnetic character
  A)
  \[Fe\] done clear
  B)
  \[Co\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Pt\] done clear
  View Solution play_arrow

• question_answer129)
  Which forms interstitial compounds [BHU 1982; MP PMT 1983]
  A)
  \[Fe\] done clear
  B)
  \[Co\] done clear
  C)
  \[Ni\] done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer130)
  Which occurs in nature in free state
  A)
  \[Fe\] done clear
  B)
  \[Co\] done clear
  C)
  \[Ni\] done clear
  D)
  \[Pt\] done clear
  View Solution play_arrow

• question_answer131)
  \[3{{d}^{10}}4{{s}^{0}}\] electronic configuration exhibits
  A)
  \[Z{{n}^{++}}\] done clear
  B)
  \[C{{u}^{++}}\] done clear
  C)
  \[C{{d}^{++}}\] done clear
  D)
  \[H{{g}^{++}}\] done clear
  View Solution play_arrow

• question_answer132)
  \[3{{d}^{0}}4{{s}^{0}}\] electronic configuration exhibits
  A)
  \[P{{d}^{+2}}\] done clear
  B)
  \[S{{c}^{+2}}\] done clear
  C)
  \[T{{i}^{+4}}\] done clear
  D)
  \[Z{{n}^{+2}}\] done clear
  View Solution play_arrow

• question_answer133)
  Rare-earth elements are exhibited by
  A)
  At. No. 58 to 71 done clear
  B)
  At. No. 21 to 30 done clear
  C)
  At. No. 39 to 71 done clear
  D)
  At. No. 81 to 91 done clear
  View Solution play_arrow

• question_answer134)
  All those elements belong to f - block whose atomic numbers are
  A)
  58 to 71 done clear
  B)
  90 to 103 done clear
  C)
  Both a and b done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer135)
  The correct order of density is
  A)
  \[Cu>Ni>Zn>Sc\] done clear
  B)
  \[Ni>Cu>Zn>Sc\] done clear
  C)
  \[Zn>Cu>Ni>Sc\] done clear
  D)
  \[Sc>Zn>Ni>Cu\] done clear
  View Solution play_arrow

• question_answer136)
  The property exhibited by only transitional elements
  A)
  To form paramagnetic compounds done clear
  B)
  To form coloured compounds done clear
  C)
  To form complex compounds done clear
  D)
  To show inert tendency done clear
  View Solution play_arrow

• question_answer137)
  Which of the following will have standard oxidation potential less than \[SHE\]
  A)
  \[Zn\] done clear
  B)
  \[Cu\] done clear
  C)
  \[Fe\] done clear
  D)
  \[Ni\] done clear
  View Solution play_arrow

• question_answer138)
  Hydrated \[C{{u}^{+2}}\] ion will be
  A)
  Green done clear
  B)
  Violet done clear
  C)
  Blue done clear
  D)
  Colourless done clear
  View Solution play_arrow

• question_answer139)
  The placement of \[Zn,\] \[Cd\] and \[Hg\] along with \['d'\] block elements is not proper because
  A)
  Their \['d'\] orbitals are completely filled done clear
  B)
  Their \['d'\] orbitals are empty done clear
  C)
  They do not form complex compounds done clear
  D)
  They do not form coloured compounds done clear
  View Solution play_arrow

• question_answer140)
  Which of the following is the weakest reducing agent
  A)
  \[Zn\] done clear
  B)
  \[Cu\] done clear
  C)
  \[{{H}_{2}}\] done clear
  D)
  \[Li\] done clear
  View Solution play_arrow

• question_answer141)
  The decrease in atomic volume from \[Cr\] to \[Cu\] is very negligible because
  A)
  Increase in nuclear change done clear
  B)
  Screening effect done clear
  C)
  Unpaired electrons of \[Cr\] done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer142)
  The heaviest atom amongst the following is [Kurukshetra CEE 1998]
  A)
  Uranium done clear
  B)
  Radium done clear
  C)
  Lead done clear
  D)
  Mercury done clear
  View Solution play_arrow

• question_answer143)
  Thallium shows different oxidation states because [Kurukshetra CEE 1998]
  A)
  It is a transition metal done clear
  B)
  Of inert-pair effect done clear
  C)
  Of its high reactivity done clear
  D)
  Of its amphoteric character done clear
  View Solution play_arrow

• question_answer144)
  The test of ozone \[{{O}_{3}}\] can be done by [AFMC 1997]
  A)
  \[Ag\] done clear
  B)
  \[Hg\] done clear
  C)
  \[Au\] done clear
  D)
  \[Cu\] done clear
  View Solution play_arrow

• question_answer145)
  Which of the following set of elements does not belong to transitional elements set [EAMCET 1998]
  A)
  \[Fe,\] \[Co,\] \[Ni\] done clear
  B)
  \[Cu,\] \[Ag,\] \[Au\] done clear
  C)
  \[Ti,\] \[Zr,\] \[Hf\] done clear
  D)
  \[Ga,\] \[In,\] \[Tl\] done clear
  View Solution play_arrow

• question_answer146)
  The transition metals mostly are [MP PMT 2000; Kerala (Med.) 2002]
  A)
  Diamagnetic done clear
  B)
  Paramagnetic done clear
  C)
  Neither diamagnetic nor paramagnetic done clear
  D)
  Both diamagnetic and paramagnetic done clear
  View Solution play_arrow

• question_answer147)
  The correct statement in respect of d-block elements [MP PMT 2000, 02]
  A)
  They are all metals done clear
  B)
  They show variable valency done clear
  C)
  They form coloured ions and complex salts done clear
  D)
  All above statements are correct done clear
  View Solution play_arrow

• question_answer148)
  Which one of the following is an example of non-typical transition elements [MP PMT 2002]
  A)
  Li, K, Na done clear
  B)
  Be, Al, Pb done clear
  C)
  Zn, Cd, Hg done clear
  D)
  Ba, Ca, Sr done clear
  View Solution play_arrow

• question_answer149)
  Which one is wrong in the following statements [Kurukshetra CET 2002]
  A)
  Gold is considered to be the king of metals done clear
  B)
  Gold is soluble in mercury done clear
  C)
  Copper is added to gold to make it hard done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer150)
  The number of unpaired electrons in \[C{{r}^{3+}}\] ion is [Kurukshetra CET 2002]
  A)
  3 done clear
  B)
  5 done clear
  C)
  4 done clear
  D)
  1 done clear
  View Solution play_arrow

• question_answer151)
  The metal ion which does not form coloured compound is [Kurukshetra CET 2002]
  A)
  Chromium done clear
  B)
  Manganese done clear
  C)
  Zinc done clear
  D)
  Iron done clear
  View Solution play_arrow

• question_answer152)
  Super alloys are usually [Kurukshetra CET 2002]
  A)
  Iron based done clear
  B)
  Nickel based done clear
  C)
  Cobalt based done clear
  D)
  Based on all of these done clear
  View Solution play_arrow

• question_answer153)
  The transitional metal which shows oxidation state from +2 to +7 belong to group
  A)
  VII B done clear
  B)
  VI B done clear
  C)
  II B done clear
  D)
  III B done clear
  View Solution play_arrow

• question_answer154)
  Which of the following may be colourless [RPMT 1997; RPET/PMT 1999]
  A)
  \[C{{r}^{+3}}\] done clear
  B)
  \[C{{u}^{+}}\] done clear
  C)
  \[F{{e}^{+3}}\] done clear
  D)
  \[C{{u}^{2+}}\] done clear
  View Solution play_arrow

• question_answer155)
  Which of the following ions is paramagnetic
  A)
  \[C{{u}^{+}}\] done clear
  B)
  \[Z{{n}^{+2}}\] done clear
  C)
  \[T{{i}^{+3}}\] done clear
  D)
  \[T{{i}^{+4}}\] done clear
  View Solution play_arrow

• question_answer156)
  Which of the following metals absorbs hydrogen
  A)
  \[K\] done clear
  B)
  \[Al\] done clear
  C)
  \[Zn\] done clear
  D)
  \[Pd\] done clear
  View Solution play_arrow

• question_answer157)
  Which of the following ions is coloured [BHU 1997]
  A)
  \[C{{u}^{+}}\] done clear
  B)
  \[C{{u}^{2+}}\] done clear
  C)
  \[T{{i}^{4+}}\] done clear
  D)
  \[{{V}^{5+}}\] done clear
  View Solution play_arrow

• question_answer158)
  The metal present in \[{{B}_{12}}\] is [BHU 1997]
  A)
  Magnesium done clear
  B)
  Iron done clear
  C)
  Cobalt done clear
  D)
  Manganese done clear
  View Solution play_arrow

• question_answer159)
  Which metal does not give the following reaction M + water or steam \[\to \]oxide + H¯ [Pb. PMT 2001]
  A)
  Mercury done clear
  B)
  Iron done clear
  C)
  Sodium done clear
  D)
  Magnesium done clear
  View Solution play_arrow

• question_answer160)
  Ionisation potential values of d-block elements as compared to ionization potential value of f-block elements are [Pb. PMT 2001]
  A)
  Higher done clear
  B)
  Equal done clear
  C)
  lower done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer161)
  Which one of the following properties is not of transition elements [MP PET 1999; CPMT 2002]
  A)
  Colour done clear
  B)
  Paramagnetism done clear
  C)
  Fixed valency done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer162)
  In which of the following, tendency towards formation of coloured ions is maximum [MP PET 1999]
  A)
  s-block elements done clear
  B)
  d-block elements done clear
  C)
  p-block elements done clear
  D)
  f-block elements done clear
  View Solution play_arrow

• question_answer163)
  The electronic configuration \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}},3{{s}^{2}}{{p}^{6}}{{d}^{6}}\] corresponds to [MP PET 1994]
  A)
  \[M{{n}^{2+}}\] done clear
  B)
  \[F{{e}^{2+}}\] done clear
  C)
  \[Co\] done clear
  D)
  \[Ge\] done clear
  View Solution play_arrow

• question_answer164)
  Which of the following statements is not correct about the electronic configuration of gaseous chromium atom [MP PET 1994]
  A)
  It has 5 electrons in \[3d\] and one electron in \[4s\] orbitals done clear
  B)
  The principal quantum numbers of its valence electrons are 3 and 4 done clear
  C)
  It has 6 electrons in \[3d\] orbital done clear
  D)
  Its valance electrons have quantum number \['l'\] 0 and 2 done clear
  View Solution play_arrow

• question_answer165)
  \[Zn\] and \[Hg\] belong to the same group, they differ in many of their properties. The property that is shared by both is [Pb. PMT 1998]
  A)
  They form oxide readily done clear
  B)
  They react with steam readily done clear
  C)
  They react with hot concentrated sulphuric acid done clear
  D)
  They react with hot sodium hydroxide done clear
  View Solution play_arrow

• question_answer166)
  Which of the following ionic species will impart colour to an aqueous solution [CBSE PMT 1998; BHU 2001]
  A)
  \[T{{i}^{4+}}\] done clear
  B)
  \[C{{u}^{+}}\] done clear
  C)
  \[Z{{n}^{2+}}\] done clear
  D)
  \[C{{r}^{3+}}\] done clear
  View Solution play_arrow

• question_answer167)
  The number of electrons in the outermost shell of the 3d-transition elements generally remains [MP PMT 1997]
  A)
  \[(n-1){{d}^{n}}\] done clear
  B)
  \[n{{d}^{n}}\] done clear
  C)
  \[n{{s}^{2}}\] done clear
  D)
  \[(n-1){{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer168)
  The 3d-elements show variable oxidation states. What is the maximum oxidation state shown by the element \[Mn\] [MP PMT 1997; JIPMER 2002]
  A)
  + 4 done clear
  B)
  + 5 done clear
  C)
    + 6 done clear
  D)
  + 7 done clear
  View Solution play_arrow

• question_answer169)
  Which of the following ions gives coloured solution [MP PET 1995]
  A)
  \[C{{u}^{+}}\] done clear
  B)
  \[Z{{n}^{++}}\] done clear
  C)
  \[A{{g}^{+}}\] done clear
  D)
  \[F{{e}^{++}}\] done clear
  View Solution play_arrow

• question_answer170)
  Which metal represents more than one oxidation state [CPMT 1990]
  A)
  \[Al\] done clear
  B)
  \[Na\] done clear
  C)
  \[Mg\] done clear
  D)
  \[Fe\] done clear
  View Solution play_arrow

• question_answer171)
  A reduction in atomic size with increase  in atomic number is a characteristic of elements of [AIEEE 2003]
  A)
  High atomic masses done clear
  B)
  d-block done clear
  C)
  f -block done clear
  D)
  Radioactive series done clear
  View Solution play_arrow

• question_answer172)
  Which one of the following characteristics of the transition metals is associated with their catalytic activity [CBSE PMT 2003]
  A)
  Variable oxidation states done clear
  B)
  High enthalpy of atomization done clear
  C)
  Paramagnetic behaviour done clear
  D)
  Colour of hydrated ions done clear
  View Solution play_arrow

• question_answer173)
  The number of oxidation states of manganese is
  A)
  4 done clear
  B)
  6 done clear
  C)
  3 done clear
  D)
  8 done clear
  View Solution play_arrow

• question_answer174)
  Which of the following transitional metal has lowest density
  A)
  \[Sc\] done clear
  B)
  \[Ti\] done clear
  C)
  \[V\] done clear
  D)
  \[Cr\] done clear
  View Solution play_arrow

• question_answer175)
  Which of the following transitional metal has lowest boiling point (B.P.)
  A)
  Zn done clear
  B)
  Sc done clear
  C)
  Ti done clear
  D)
  V done clear
  View Solution play_arrow

• question_answer176)
  Which of the following electronic configuration is that of a transitional element [NCERT 1983; CPMT 1989, 97; MP PET/PMT 1997; AIIMS 2000; MP PMT 2002]
  A)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}},3{{s}^{2}}{{p}^{6}}{{d}^{10}},4{{s}^{2}}{{p}^{6}}\] done clear
  B)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}},3{{s}^{2}}{{p}^{6}}{{d}^{10}},4{{s}^{2}}{{p}^{1}}\] done clear
  C)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}},3{{s}^{2}}{{p}^{6}}{{d}^{2}},4{{s}^{2}}\] done clear
  D)
  \[1{{s}^{2}},2{{s}^{2}}{{p}^{6}},3{{s}^{2}}{{p}^{6}},4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer177)
  \[Fe\] has been placed in the eighth group, the number of electrons in the outermost orbit is
  A)
  1 done clear
  B)
  2 done clear
  C)
  3 done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer178)
  Due to covalent bonding, the transitional metals are
  A)
  Lustrous done clear
  B)
  Conductor done clear
  C)
  Hard and brittle done clear
  D)
  Ductile done clear
  View Solution play_arrow

• question_answer179)
  The magnetic moment of a metal ion of first transition series is 2.83 \[BM\]. Therefore it will have unpaired electrons
  A)
  6 done clear
  B)
  4 done clear
  C)
  3 done clear
  D)
  2 done clear
  View Solution play_arrow

• question_answer180)
  Which of the following pair of ions may exhibit same colour
  A)
  \[C{{r}^{+++}}\] and \[F{{e}^{++}}\] done clear
  B)
  \[T{{i}^{+++}}\] and \[{{V}^{++}}\] done clear
  C)
  \[F{{e}^{+++}}\] and \[M{{n}^{++}}\] done clear
  D)
  \[C{{u}^{+}}\] and \[N{{i}^{++}}\] done clear
  View Solution play_arrow

• question_answer181)
  The number of incomplete orbitals in inner transition element is [Pb. PMT 2001]
  A)
  2 done clear
  B)
  3 done clear
  C)
  4 done clear
  D)
  1 done clear
  View Solution play_arrow

• question_answer182)
  Most common oxidation states of \[Cs\] (cesium) are [AIEEE 2002]
  A)
  + 2, + 3 done clear
  B)
  + 2, + 4 done clear
  C)
  + 3, + 4 done clear
  D)
  + 3, + 5 done clear
  View Solution play_arrow

• question_answer183)
  The \[3d\] elements show variable oxidation states because the energies of the following sets of orbitals are almost similar
  A)
  \[ns,(n-1)d\] done clear
  B)
  \[ns,nd\] done clear
  C)
  \[(n-1)s,nd\] done clear
  D)
  \[np,(n-1)d\] done clear
  View Solution play_arrow

• question_answer184)
  Which of the following \[3d\] bivalent metal ions has the smallest number of unpaired \[d\] electrons
  A)
  \[3{{d}^{6}}\] done clear
  B)
  \[3{{d}^{7}}\] done clear
  C)
  \[3{{d}^{8}}\] done clear
  D)
  \[3{{d}^{9}}\] done clear
  View Solution play_arrow

• question_answer185)
  The \[3d\] metal ions form coloured compounds because the energy corresponding to the following lies in the visible range of electromagnetic spectrum
  A)
  Free energy change of complex formation by \[3d\] metal ions done clear
  B)
  \[d-d\] transitions of \[3d\] electrons done clear
  C)
  Heat of hydration of \[3d\] metal ions done clear
  D)
  Ionisation energy of \[3d\] metal ions done clear
  View Solution play_arrow

• question_answer186)
  The oxidation number of iron in potassium ferrocyanide is
  A)
  +2 done clear
  B)
  +3 done clear
  C)
  +4 done clear
  D)
  Zero done clear
  View Solution play_arrow

• question_answer187)
  In transition elements, the orbitals partially filled by electrons are [DPMT 1984; MP PMT 1999]
  A)
  s - orbitals done clear
  B)
  p - orbitals done clear
  C)
  d - orbitals done clear
  D)
  f - orbitals done clear
  View Solution play_arrow

• question_answer188)
  Number of unpaired electrons in \[M{{n}^{2+}}\] is [CPMT 1997; Pb. PET/PMT 1999]
  A)
  3 done clear
  B)
  5 done clear
  C)
  4 done clear
  D)
  1 done clear
  View Solution play_arrow

• question_answer189)
  Mercury is the only metal which is liquid at \[{{0}^{o}}C\]. This is due to its [CBSE PMT 1995]
  A)
  Very high ionisation energy and weak metallic bond done clear
  B)
  Low ionisation potential done clear
  C)
  High atomic weight done clear
  D)
  High vapour pressure done clear
  View Solution play_arrow

• question_answer190)
  Essential constituent of an amalgam is [DPMT 1982; CPMT 1973, 77, 78, 89]
  A)
  Iron done clear
  B)
  An alkali metal done clear
  C)
  Silver done clear
  D)
  Mercury done clear
  View Solution play_arrow

• question_answer191)
  Mercury is transported in metal containers made of [DPMT 1982; CPMT 1973]
  A)
  Silver done clear
  B)
  Lead done clear
  C)
  Iron done clear
  D)
  Aluminium done clear
  View Solution play_arrow

• question_answer192)
  The electroplating of chromium is undertaken because [MP PMT 1994]
  A)
  Electrolysis of chromium is easier done clear
  B)
  Chromium can form alloys with other metals done clear
  C)
  Chromium gives protective and decorative coating to the base metal done clear
  D)
  Of the high reactivity of metallic chromium done clear
  View Solution play_arrow

• question_answer193)
  An element having the electronic configuration \[\left[ Ar \right]3{{d}^{2}}4{{s}^{2}}\] belongs to [MP PMT 1993]
  A)
  s - block elements done clear
  B)
  p - block elements done clear
  C)
  d - block elements done clear
  D)
  f - block elements done clear
  View Solution play_arrow

• question_answer194)
  Which one of the following is not a transition metal [MP PMT 1999]
  A)
  Chromium done clear
  B)
  Titanium done clear
  C)
  Lead done clear
  D)
  Tungsten done clear
  View Solution play_arrow

• question_answer195)
  The atomic number of an element is 22. The highest oxidation state exhibited by it in its compounds is [MP PMT 1996]
  A)
  1 done clear
  B)
  2 done clear
  C)
  3 done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer196)
  d-block elements form
  A)
  Ionic compounds done clear
  B)
  Covalent compounds done clear
  C)
  Ionic and covalent compounds done clear
  D)
  Only complex compounds done clear
  View Solution play_arrow

• question_answer197)
  The transition metals have a less tendency to form ions due to [Bihar CEE 1995]
  A)
  High ionisation energy done clear
  B)
  Low heat of hydration of ion done clear
  C)
  High heat of sublimation done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer198)
  The electronic configuration of \[Ag\] atom is [CPMT 1984]
  A)
  \[\left[ Kr \right]3{{d}^{10}}4{{s}^{1}}\] done clear
  B)
  \[\left[ Xe \right]4{{f}^{14}}{{d}^{10}}6{{s}^{1}}\] done clear
  C)
  \[\left[ Kr \right]4{{d}^{10}}5{{s}^{1}}\] done clear
  D)
  \[\left[ Kr \right]4{{d}^{9}}5{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer199)
  Most powerful oxidizing property of manganese is shown by which of the following oxidation state [MP PET 2003]
  A)
  \[Mn\,(+7)\] done clear
  B)
  \[Mn\,(+2)\] done clear
  C)
  \[Mn\left( +4 \right)\] done clear
  D)
  \[Mn\,(+5)\] done clear
  View Solution play_arrow

• question_answer200)
  Which one of the following ions is colourless [MP PET 1999; RPET/PMT 1999]
  A)
  \[C{{u}^{+}}\] done clear
  B)
  \[C{{o}^{2+}}\] done clear
  C)
  \[N{{i}^{2+}}\] done clear
  D)
  \[F{{e}^{3+}}\] done clear
  View Solution play_arrow

• question_answer201)
  The atomic radii of the elements are almost same of which series
  A)
  \[Fe-Co-Ni\] done clear
  B)
  \[Na-K-Rb\] done clear
  C)
  \[F-Cl-Br\] done clear
  D)
  \[Li-Be-B\] done clear
  View Solution play_arrow

• question_answer202)
  In human body if necessary, the plate, screw or wire used for surgery are made up of
  A)
  \[Ni\] done clear
  B)
  \[Au\] done clear
  C)
  \[Pt\] done clear
  D)
  \[Ta\] done clear
  View Solution play_arrow

• question_answer203)
  Manganese is related to which block of periodic table [MP PMT 2003]
  A)
  s-block done clear
  B)
  p-block done clear
  C)
  d-block done clear
  D)
  f -block done clear
  View Solution play_arrow

• question_answer204)
  A hard and resistant metal (alloy) generally used in tip of nib of fountain pen is [BHU 1982]
  A)
  \[Os.Ir\] done clear
  B)
  \[Pt.Cr\] done clear
  C)
  \[V.Fe\] done clear
  D)
  \[Fe.Cr\] done clear
  View Solution play_arrow

• question_answer205)
  Chloride of which of the following elements will be coloured [MP PMT 1999]
  A)
  Silver done clear
  B)
  Mercury done clear
  C)
  Zinc done clear
  D)
  Cobalt done clear
  View Solution play_arrow

• question_answer206)
  Which of the following ions has the highest magnetic moment [JIPMER 1997; AIEEE 2002]
  A)
  \[T{{i}^{3+}}\] done clear
  B)
  \[S{{c}^{3+}}\] done clear
  C)
  \[M{{n}^{2+}}\] done clear
  D)
  \[Z{{n}^{2+}}\] done clear
  View Solution play_arrow

• question_answer207)
  Cerium \[(Z=58)\] is an important member of the lanthanoids. Which of the following statements about cerium is incorrect  [AIEEE 2004]
  A)
  The +4 oxidation state of cerium is not known in solutions done clear
  B)
  The +3 oxidation state of cerium is more stable than the +4 oxidation state done clear
  C)
  The common oxidation states of cerium are +3 and +4 done clear
  D)
  Cerium (IV) acts as an oxidizing agent done clear
  View Solution play_arrow

• question_answer208)
  Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them [AIEEE 2004]
  A)
  \[(n-1){{d}^{3}}n{{s}^{2}}\] done clear
  B)
  \[(n-1){{d}^{5}}n{{s}^{1}}\] done clear
  C)
  \[(n-1){{d}^{8}}n{{s}^{2}}\] done clear
  D)
  \[(n-1){{d}^{5}}n{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer209)
  Among the following series of transition metal ions, the one where all metals ions have \[3{{d}^{2}}\] electronic configuration is [CBSE PMT 2004]
  A)
  \[T{{i}^{4+}},\ {{V}^{3+}},\ C{{r}^{2+}},\ M{{n}^{3+}}\] done clear
  B)
  \[T{{i}^{2+}},\ {{V}^{3+}},\ C{{r}^{4+}},\ M{{n}^{5+}}\] done clear
  C)
  \[T{{i}^{3+}},\ {{V}^{2+}},\ C{{r}^{3+}},\ M{{n}^{4+}}\] done clear
  D)
  \[T{{i}^{+}},\ {{V}^{4+}},\ C{{r}^{6+}},\ M{{n}^{7+}}\] done clear
  View Solution play_arrow

• question_answer210)
  Lanthanoids are [CBSE PMT 2004]
  A)
  14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sublevel done clear
  B)
  14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sublevel done clear
  C)
  14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sublevel done clear
  D)
   14 elements in the seventh period (atomic no. = 90 to 103) that are filling 4f sublevel done clear
  View Solution play_arrow

• question_answer211)
  Which of the following metals make the most efficient catalyst [BHU 1995]
  A)
  Transition done clear
  B)
  Alkali done clear
  C)
  Alkaline earth done clear
  D)
  Coloured metals done clear
  View Solution play_arrow

• question_answer212)
  Lanthanides and actinides resemble in [AFMC 2004]
  A)
  Electronic configuration done clear
  B)
  Oxidation state done clear
  C)
  Ionization energy done clear
  D)
  Formation of complexes done clear
  View Solution play_arrow

• question_answer213)
  The lanthanide contraction relates to [Kerala PMT 2004]
  A)
  Atomic radii done clear
  B)
  Atomic as well as \[{{M}^{3+}}\] radii done clear
  C)
  Valence electrons done clear
  D)
  Oxidation states done clear
  E)
  Ionisation energy done clear
  View Solution play_arrow

• question_answer214)
  Which of the following species is expected to show the highest magnetic moment? (At. Nos.: Cr=24, Mn = 25, Co = 27, Ni = 28, Cu = 29) [Kerala PMT 2004]
  A)
  \[C{{r}^{2+}}\] done clear
  B)
  \[M{{n}^{2+}}\] done clear
  C)
  \[C{{u}^{2+}}\] done clear
  D)
  \[C{{o}^{2+}}\] done clear
  E)
  \[N{{i}^{2+}}\] done clear
  View Solution play_arrow

• question_answer215)
  Which one belongs to 3d-transition series [MP PMT 2004]
  A)
  Copper done clear
  B)
  Gold done clear
  C)
  Cobalt done clear
  D)
  Silver done clear
  View Solution play_arrow

• question_answer216)
  Which one of the following organisation's iron and steel plant was built to use charcoal as a source of power, to start with, but later switched over to hydroelectricity  [AIIMS 2004]
  A)
  The Tata Iron and Steel Company done clear
  B)
  The Indian Iron and Steel Company done clear
  C)
  Mysore Iron and Steel Limited done clear
  D)
  Hindustan Steel Limited done clear
  View Solution play_arrow

• question_answer217)
  Which of the following is the correct sequence of atomic weights of given elements [Pb. CET 2002]
  A)
  \[Fe>Co>Ni\] done clear
  B)
  \[Ni>Co>Fe\] done clear
  C)
  \[Co>Ni>Fe\] done clear
  D)
  \[Fe>Ni>Co\] done clear
  View Solution play_arrow

• question_answer218)
  Which of the following element has maximum first ionisation potential [Pb. CET 2002]
  A)
  V done clear
  B)
  Ti done clear
  C)
  Cr done clear
  D)
  Mn done clear
  View Solution play_arrow

• question_answer219)
  A metal M having electronic configuration   \[M\]-\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{p}^{6}}3{{d}^{10}}4{{s}^{1}}\] [DCE 2002]
  A)
  s-block element done clear
  B)
  d-block element done clear
  C)
  p-block element done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer220)
  Identify the transition element [MH CET 2003]
  A)
  \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}},\ 4{{s}^{2}}\] done clear
  B)
  \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{2}},\ 4{{s}^{2}}\] done clear
  C)
  \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{10}},\ 4{{s}^{2}}4{{p}^{2}}\] done clear
  D)
  \[1{{s}^{2}},\ 2{{s}^{2}}2{{p}^{6}},\ 3{{s}^{2}},\ 3{{p}^{6}}3{{d}^{10}},\ 4{{s}^{2}}4{{p}^{1}}\] done clear
  View Solution play_arrow

• question_answer221)
  What is the name of element with atomic number 105 [CPMT 2004]
  A)
  Kurchatovium done clear
  B)
  Dubnium done clear
  C)
  Nobelium done clear
  D)
  Holmium done clear
  View Solution play_arrow

• question_answer222)
  Electrons in a paramagnetic compound are [UPSEAT 2004]
  A)
  Shared done clear
  B)
  Unpaired done clear
  C)
  Donated done clear
  D)
  Paired done clear
  View Solution play_arrow

• question_answer223)
  Which of the following pairs involves isoelectronic ions [UPSEAT 2004]
  A)
  \[M{{n}^{3+}}\]and \[F{{e}^{2+}}\] done clear
  B)
  \[M{{n}^{2+}}\] and \[F{{e}^{3+}}\] done clear
  C)
  \[C{{r}^{3+}}\] and \[F{{e}^{2+}}\] done clear
  D)
  \[F{{e}^{2+}}\] and \[C{{o}^{2+}}\] done clear
  View Solution play_arrow

• question_answer224)
  Which of the following is paramagnetic [Pb. CET 2000]
  A)
  \[N{{i}^{++}}\] done clear
  B)
  \[C{{u}^{+}}\] done clear
  C)
  \[Z{{n}^{++}}\] done clear
  D)
  \[S{{c}^{+++}}\] done clear
  View Solution play_arrow

• question_answer225)
  The electronic configuration of chromium is [BHU 2005; Pb. CET 2000]
  A)
  \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{4}},4{{s}^{2}}\] done clear
  B)
  \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},4{{s}^{1}}\] done clear
  C)
  \[[Ne]3{{s}^{2}}3{{p}^{6}}3{{d}^{6}},4{{s}^{1}}\] done clear
  D)
  \[[Ne]3{{s}^{2}}3{{p}^{5}}3{{d}^{5}},4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer226)
  Electronic configuration of \[Cu(Z=29)\] is [Pb. CET 2001]
  A)
  \[[Ar]3{{d}^{9}}4{{s}^{2}}\] done clear
  B)
  \[[Ar]3{{d}^{10}}4{{s}^{1}}\] done clear
  C)
  \[[Ar]3{{d}^{5}}4{{s}^{2}}\] done clear
  D)
  \[[Ar]3{{d}^{6}}4{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer227)
  Ce-58 is a member of [Pb. CET 2002]
  A)
  s-block done clear
  B)
  p-block done clear
  C)
  d-block done clear
  D)
  f-block done clear
  View Solution play_arrow

• question_answer228)
  How many unpaired electrons are there in \[N{{i}^{2+}}\] [MP PET 2004]
  A)
  2 done clear
  B)
  4 done clear
  C)
  5 done clear
  D)
  0 done clear
  View Solution play_arrow

• question_answer229)
  The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding lanthanoids is [CBSE PMT 2005]
  A)
  Lesser energy difference between 5f and 6d orbitals than between 4f and 5d orbitals done clear
  B)
  Larger atomic size of actinoids than the lanthanoids done clear
  C)
  More energy difference between 5f and 6d orbitals than between 4f and 5d orbitals done clear
  D)
  Greater reactive nature of the actinoids than the lanthanoids done clear
  View Solution play_arrow

• question_answer230)
  Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy   [CBSE PMT 2005]
  A)
  Vanadium (Z = 23) done clear
  B)
  Chromium (Z = 24) done clear
  C)
  Iron (Z = 26) done clear
  D)
  Manganese (Z = 25) done clear
  View Solution play_arrow

• question_answer231)
  The aqueous solution containing which one of the following ions will be colourless [CBSE PMT 2000, 05]
  A)
  \[S{{c}^{3+}}\] done clear
  B)
  \[F{{e}^{2+}}\] done clear
  C)
  \[T{{i}^{3+}}\] done clear
  D)
  \[M{{n}^{2+}}\] (Atomic number Sc = 21, Fe = 26, Ti = 22, Mn = 25) done clear
  View Solution play_arrow

• question_answer232)
  Which of the following trivalent ion has the largest atomic radii in the lanthanide series [BHU 2002]
  A)
  La done clear
  B)
  Ce done clear
  C)
  Pm done clear
  D)
  Lu done clear
  View Solution play_arrow

• question_answer233)
  Which of the following does not have valence electron in 3d-subshell [AIIMS 2002]
  A)
  Fe (III) done clear
  B)
  Mn  (II) done clear
  C)
  Cr (I) done clear
  D)
  P (0) done clear
  View Solution play_arrow

• question_answer234)
  Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other in [AIIMS 2005]
  A)
  \[T{{l}^{+}},\ T{{l}^{3+}}\] done clear
  B)
  \[C{{u}^{+}},\ C{{u}^{2+}}\] done clear
  C)
  \[C{{r}^{2+}},\ C{{r}^{3+}}\] done clear
  D)
  \[{{V}^{2+}},\ V{{O}^{2+}}\] done clear
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• question_answer235)
  The lanthanide contraction is responsible for the fact that [AIEEE 2005]
  A)
  \[Zr\] and \[Y\] have about the same radius done clear
  B)
  \[Zr\] and \[Nb\] have similar oxidation state done clear
  C)
  \[Zr\] and \[Hf\] have about the same radius done clear
  D)
  \[Zr\] and \[Zn\] have the same oxidation sate done clear
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• question_answer236)
  Which of the following factors may be regarded as the main cause of lanthanide contraction [AIEEE 2005]
  A)
  Poor shielding of one of \[4f\] electron by another in the subshell done clear
  B)
  Effective shielding of one of \[4f\] electrons by another in the subshell done clear
  C)
  Poorer shielding of \[5d\] electrons by \[4f\] electrons done clear
  D)
  Greater shielding of \[5d\] electron by \[4f\] electrons done clear
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• question_answer237)
  Which of the following have maximum number of unpaired electrons [BHU 2005]
  A)
  Fe3+ done clear
  B)
  Fe2+ done clear
  C)
  Co2+ done clear
  D)
  Co3+ done clear
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• question_answer238)
  Transition metals show paramagnetism [BHU 2005]
  A)
  Due to characteristic configuration done clear
  B)
  High lattice energy done clear
  C)
  Due to variable oxidation states done clear
  D)
  Due to unpaired electrons done clear
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• question_answer239)
  Which of the following pairs of elements  cannot form an alloy [KCET 2005]
  A)
  \[Zn,\,Cu\] done clear
  B)
  \[Fe,\,Hg\] done clear
  C)
  \[Fe,\,C\] done clear
  D)
  \[Hg,\,Na\] done clear
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• question_answer240)
  Which belongs to the actinides series [J & K 2005]
  A)
  \[Ce\] done clear
  B)
  \[Cf\] done clear
  C)
  \[Ca\] done clear
  D)
  \[Cs\] done clear
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• question_answer241)
  Effective magnetic droment of \[S{{c}^{+3}}\]ion is  [Kerala CET 2005]
  A)
  1.73 done clear
  B)
  0 done clear
  C)
  5.92 done clear
  D)
  2.83 done clear
  E)
  3.87 done clear
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