JEE Main & Advanced Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank

done Alkali Metals Total Questions - 150

• question_answer1)
  As compared to potassium, sodium has [MP PMT 1985]
  A)
  Lower electronegativity done clear
  B)
  Higher ionization potential done clear
  C)
  Greater atomic radius done clear
  D)
  Lower melting point done clear
  View Solution play_arrow

• question_answer2)
  Potassium is kept in [CPMT 1976]
  A)
  Alcohol done clear
  B)
  Water done clear
  C)
  Kerosene done clear
  D)
  Liquid ammonia done clear
  View Solution play_arrow

• question_answer3)
  The product obtained on fusion of \[BaS{{O}_{4}}\] and \[N{{a}_{2}}C{{O}_{3}}\] is [AFMC 2005]
  A)
  \[BaC{{O}_{3}}\] done clear
  B)
  BaO done clear
  C)
  \[Ba{{(OH)}_{2}}\] done clear
  D)
  \[BaHS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer4)
  Which of the following statement  is  correct  regarding alkali metals [NCERT 1981]
  A)
  Cation is less stable than the atom done clear
  B)
  Cation is smaller than the atom done clear
  C)
  Size of cation and atom is the same done clear
  D)
  Cation is greater in size than the atom done clear
  View Solution play_arrow

• question_answer5)
  Valency electrons in alkali metals are [CPMT 1972]
  A)
  1 done clear
  B)
  7 done clear
  C)
  4 done clear
  D)
  2 done clear
  View Solution play_arrow

• question_answer6)
  Magnitude of which of the following property of alkali metals  increases with the increase of  atomic number [MP PMT 1987]
  A)
  Electronegativity done clear
  B)
  Ionic radius done clear
  C)
  First ionization energy done clear
  D)
  Melting point done clear
  View Solution play_arrow

• question_answer7)
  As compared to lithium, sodium reacts quickly with water because [NCERT 1978, 80]
  A)
  Its molecular weight is less done clear
  B)
  It is stronger electronegative done clear
  C)
  It is stronger electropositive done clear
  D)
  It is a metal done clear
  View Solution play_arrow

• question_answer8)
  Which is an ore of potassium [DPMT 1984; CPMT 1986; Kurukshetra CEE 1998]
  A)
  Carnellite done clear
  B)
  Cryolite done clear
  C)
  Bauxite done clear
  D)
  Dolomite done clear
  View Solution play_arrow

• question_answer9)
  \[N{{a}_{2}}C{{O}_{3}}\] can be manufactured by Solvey's process but \[{{K}_{2}}C{{O}_{3}}\] cannot be prepared because     [MP PMT 1993]
  A)
  \[{{K}_{2}}C{{O}_{3}}\] is more soluble done clear
  B)
  \[{{K}_{2}}C{{O}_{3}}\] is less soluble done clear
  C)
  \[KHC{{O}_{3}}\] is more soluble than \[NaHC{{O}_{3}}\] done clear
  D)
  \[KHC{{O}_{3}}\] is less soluble than \[NaHC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer10)
  Which of the following alkali metals is smallest in size [CPMT 1990]
  A)
  \[Rb\] done clear
  B)
  \[K\] done clear
  C)
  \[Na\] done clear
  D)
  \[Li\] done clear
  View Solution play_arrow

• question_answer11)
  When potassium dichromate crystal are heated with conc. HCl [DCE 1999]
  A)
  \[{{O}_{2}}\] is evolved done clear
  B)
  Chromyl chloride vapours are evolved done clear
  C)
  \[C{{l}_{2}}\] is evolved done clear
  D)
  No reaction takes place done clear
  View Solution play_arrow

• question_answer12)
  Which of the following does not illustrate the anomalous properties of lithium [MP PET 1993]
  A)
  The melting point and boiling point of \[Li\] are comparatively high done clear
  B)
  \[Li\] is much softer than the other group I metals done clear
  C)
  \[Li\] forms a nitride \[L{{i}_{3}}N\] unlike group I metals done clear
  D)
  The ion of \[Li\] and its compounds are more heavily hydrated than those of the rest of the group done clear
  View Solution play_arrow

• question_answer13)
  Correct order of increasing activity is
  A)
  \[Cu,\] \[Mg,\] \[Na\] done clear
  B)
  \[Na,\] \[Mg,\] \[Cu\] done clear
  C)
  \[Mg,\] \[Na,\] \[Cu\] done clear
  D)
  \[Cu,\] \[Na,\] \[Mg\] done clear
  View Solution play_arrow

• question_answer14)
  On heating anhydrous \[N{{a}_{2}}C{{O}_{3}}\], ........ is evolved [CPMT 1971, 79]
  A)
  \[C{{O}_{2}}\] done clear
  B)
  Water vapour done clear
  C)
  \[CO\] done clear
  D)
  No gas done clear
  View Solution play_arrow

• question_answer15)
  Chile saltpetre is [DPMT 1984; CPMT 1986, 89; CET Pune 1998; MP PMT 2003]
  A)
  \[NaN{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}S{{O}_{4}}\] done clear
  C)
  \[KN{{O}_{3}}\] done clear
  D)
  \[N{{a}_{2}}S{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer16)
  A mixture of \[KCl\] and \[KF\] is added to sodium chloride
  A)
  To increase the conductivity of \[NaCl\] done clear
  B)
  To decrease the melting point of \[NaCl\] done clear
  C)
  To supress the degree of dissociation of \[NaCl\] done clear
  D)
  To decrease the volatility of \[NaCl\] done clear
  View Solution play_arrow

• question_answer17)
  A well known reagent which contains copper sulphate, sodium potassium tarterate and sodium hydroxide is
  A)
  Fenton's reagent done clear
  B)
  Schiff's reagent done clear
  C)
  Fehling's solution done clear
  D)
  Nessler's reagent done clear
  View Solution play_arrow

• question_answer18)
  Sodium metal can be stored under [CPMT 1972, 85; BHU 1983]
  A)
  Benzene done clear
  B)
  Kerosene done clear
  C)
  Alcohol done clear
  D)
  Toluene done clear
  View Solution play_arrow

• question_answer19)
  The most dangerous method of preparing hydrogen would be by the action of \[HCl\] and [JIPMER 2000]
  A)
  \[Al\] done clear
  B)
  \[K\] done clear
  C)
  \[Fe\] done clear
  D)
  \[Zn\] done clear
  View Solution play_arrow

• question_answer20)
  Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point [AIEEE 2005]
  A)
  LiCl done clear
  B)
  NaCl done clear
  C)
  KCl done clear
  D)
  RbCl done clear
  View Solution play_arrow

• question_answer21)
  The correct formula of hypo is
  A)
  \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O\] done clear
  B)
  \[N{{a}_{2}}S{{O}_{4}}\] done clear
  C)
  \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.4{{H}_{2}}O\] done clear
  D)
  \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.3{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer22)
  The reagent commonly used to determine hardness of water titrimetrically is [AIIMS 2003]
  A)
  Oxalic acid done clear
  B)
  Disodium salt of EDTA done clear
  C)
  Sodium citrate done clear
  D)
  Sodium thiosulphate done clear
  View Solution play_arrow

• question_answer23)
  \[{{K}_{2}}C{{S}_{3}}\] can be called potassium [CPMT 1972, 74]
  A)
  Thiocyanate done clear
  B)
  Thiocarbonate done clear
  C)
  Thiocarbide done clear
  D)
  Sulphocyanide done clear
  View Solution play_arrow

• question_answer24)
  Which is most basic in character [BHU 1982]
  A)
  \[RbOH\] done clear
  B)
  \[KOH\] done clear
  C)
  \[NaOH\] done clear
  D)
  \[LiOH\] done clear
  View Solution play_arrow

• question_answer25)
  When washing soda is heated [AFMC 2005]
  A)
  CO is released done clear
  B)
  \[CO+C{{O}_{2}}\] is released done clear
  C)
  \[C{{O}_{2}}\] is released done clear
  D)
  Water vapour is released done clear
  View Solution play_arrow

• question_answer26)
  Which of the following is correct [CPMT 1971]
  A)
  All carbonates are soluble in water done clear
  B)
  Carbonates of \[Na,\] \[K\] and  \[N{{H}_{4}}\] are soluble in water done clear
  C)
  Carbonates of \[Ca,\] \[Sr,\] \[Ba\] are soluble in water done clear
  D)
  All carbonates are insoluble done clear
  View Solution play_arrow

• question_answer27)
  Nitre is [CPMT 1986]
  A)
  \[AgN{{O}_{3}}\] done clear
  B)
  \[KN{{O}_{3}}\] done clear
  C)
  \[N{{H}_{4}}N{{O}_{3}}\] done clear
  D)
  \[NaN{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer28)
  Nelson cell is used for the preparation of [CPMT 1985]
  A)
  Slaked lime done clear
  B)
  Baryta done clear
  C)
  Sodium done clear
  D)
  Caustic soda done clear
  View Solution play_arrow

• question_answer29)
  Potash alum is a [CPMT 1986; MNR 1981]
  A)
  Complex salt done clear
  B)
  Acid salt done clear
  C)
  Double salt done clear
  D)
  Normal salt done clear
  View Solution play_arrow

• question_answer30)
  The process of industrial manufacturing of sodium carbonate is known as [CPMT 1978, 86; MP PMT 1995]
  A)
  Castner process done clear
  B)
  Haber's process done clear
  C)
  Le-blanc process done clear
  D)
  Chamber process done clear
  View Solution play_arrow

• question_answer31)
  The colour of hydrogen is [IIT 1980]
  A)
  Black done clear
  B)
  Yellow done clear
  C)
  Orange done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  Which one of the following salts gives aqueous solution which is weakly basic [Bihar CEE 1995]
  A)
  \[NaHC{{O}_{3}}\] done clear
  B)
  \[NaHS{{O}_{4}}\] done clear
  C)
  \[NaCl\] done clear
  D)
  \[N{{H}_{4}}HC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer33)
  An example for  a double salt is [KCET 2002]
  A)
  Silver nitrate done clear
  B)
  Mohr's salt done clear
  C)
  Potassium ferricyanide done clear
  D)
  Cupromonium sulphate done clear
  View Solution play_arrow

• question_answer34)
  The elements of group IA provide a colour to the flame of Bunson burner due to [AIIMS 1987]
  A)
  Low ionization potential done clear
  B)
  Low melting point done clear
  C)
  Softness done clear
  D)
  Presence of one electron in the outermost orbit done clear
  View Solution play_arrow

• question_answer35)
  Which of the following is the smallest cation [MP PMT 1993]
  A)
  \[N{{a}^{+}}\] done clear
  B)
  \[M{{g}^{+2}}\] done clear
  C)
  \[C{{a}^{+2}}\] done clear
  D)
  \[A{{l}^{+3}}\] done clear
  View Solution play_arrow

• question_answer36)
  \[K,\] \[Ca\] and \[Li\] metals may be arranged in the decreasing order of their standard electrode potentials as [CPMT 1990]
  A)
  \[K,\] \[Ca,\] \[Li\] done clear
  B)
  \[Li,\] \[K,\] \[Ca\] done clear
  C)
  \[Li,\] \[Ca,\] \[K\] done clear
  D)
  \[Ca,\] \[Li,\] \[K\] done clear
  View Solution play_arrow

• question_answer37)
  Alkali metals lose electrons in [CBSE PMT 1990]
  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_answer38)
  The alkali metal that reacts with nitrogen directly to form nitride is [Roorkee 1992; MP PMT 2000; BHU 2000]
  A)
  \[Li\] done clear
  B)
  \[Na\] done clear
  C)
  \[K\] done clear
  D)
  \[Rb\] done clear
  View Solution play_arrow

• question_answer39)
  Which of the following has density greater than water [MP PET 1994]
  A)
  \[Li\] done clear
  B)
  \[Na\] done clear
  C)
  \[K\] done clear
  D)
  \[Rb\] done clear
  View Solution play_arrow

• question_answer40)
  The reactivity of the alkali metal sodium with water, is made use of [MP PMT 1994]
  A)
  In drying of alcohols done clear
  B)
  In drying of benzene done clear
  C)
  In drying of ammonia solution done clear
  D)
  As a general drying agent done clear
  View Solution play_arrow

• question_answer41)
  Which of the following has smaller size [RPET 2003]
  A)
  \[H\] done clear
  B)
  \[H{{e}^{+}}\] done clear
  C)
  \[_{1}{{H}^{2}}\] done clear
  D)
  \[L{{i}^{2+}}\] done clear
  View Solution play_arrow

• question_answer42)
  \[KF\] combines with \[HF\] to form \[KH{{F}_{2}}\]. The compound contains the species [IIT 1996]
  A)
  \[{{K}^{+}},\] \[{{F}^{-}}\] and \[{{H}^{+}}\] done clear
  B)
  \[{{K}^{+}},\] \[{{F}^{-}}\] and \[HF\] done clear
  C)
  \[{{K}^{+}}\] and \[{{\left[ H{{F}_{2}} \right]}^{-}}\] done clear
  D)
  \[{{\left[ KHF \right]}^{+}}\] and \[{{F}^{-}}\] done clear
  View Solution play_arrow

• question_answer43)
  Which alkali metal is most metallic in character [MH CET 2001]
  A)
  K done clear
  B)
  Cs done clear
  C)
  Na done clear
  D)
  Li done clear
  View Solution play_arrow

• question_answer44)
  The property of hydrogen which distinguishes it from other alkali metals is [MP PET 1996]
  A)
  Its electropositive character done clear
  B)
  Its affinity for non-metals done clear
  C)
  Its reducing character done clear
  D)
  Its non-metallic character done clear
  View Solution play_arrow

• question_answer45)
  Which of the following reacts with water with high rate [AFMC 1995]
  A)
  \[Li\] done clear
  B)
  \[K\] done clear
  C)
  \[Na\] done clear
  D)
  \[Rb\] done clear
  View Solution play_arrow

• question_answer46)
  The valence shell electronic configuration of alkali metals is [MP PET 1996; UPSEAT 2001]
  A)
  \[n{{s}^{2}}n{{p}^{1}}\] done clear
  B)
  \[n{{s}^{1}}\] done clear
  C)
  \[(n-1){{p}^{6}}n{{s}^{2}}\] done clear
  D)
  \[(n-1){{d}^{2}}n{{s}^{2}}\] done clear
  View Solution play_arrow

• question_answer47)
  Alkali metals are [MP PMT 1996]
  A)
  Li, Na, Be, Mg, Cs done clear
  B)
  Li, Na, K, Rb, Cs done clear
  C)
  Na, K, Mg, Ca, Rb done clear
  D)
  K, Rb, Cs, Ba, Sr done clear
  View Solution play_arrow

• question_answer48)
  The atomic number of an element is 11. Its oxide will be [MP PMT 1996]
  A)
  Acidic done clear
  B)
  Basic done clear
  C)
  Acid and basic both done clear
  D)
  Neutral done clear
  View Solution play_arrow

• question_answer49)
  The commercial production of sodium carbonate is done by [CPMT 1982; MP PMT 1996]
  A)
  Lead-chamber process done clear
  B)
  Haber's process done clear
  C)
  Solvay's process done clear
  D)
  Castner's process done clear
  View Solution play_arrow

• question_answer50)
  Alkali metals are strong reducing because
  A)
  These are monovalent done clear
  B)
  Their ionisation potential are very high done clear
  C)
  Their standard electrode potential are very much negative done clear
  D)
  These are metals done clear
  View Solution play_arrow

• question_answer51)
  Which of the following statement about LiCl and \[NaCl\] is correct [Kurukshetra CEE 2002]
  A)
  LiCl has higher melting point than NaCl done clear
  B)
  LiCl dissolves in water whereas NaCl does not done clear
  C)
  LiCl would ionize in water more than NaCl done clear
  D)
  Fused LiCl would be less conducting than fused NaCl done clear
  View Solution play_arrow

• question_answer52)
  In the Castner?s process for the extraction of sodium, the anode is made of.......metal. [EAMCET 2003]
  A)
  Copper done clear
  B)
  Iron done clear
  C)
  Sodium done clear
  D)
  Nickel done clear
  View Solution play_arrow

• question_answer53)
  Which of the following  s-block elements forms nitride [RPET 2003]
  A)
  Ba done clear
  B)
  \[Be\] done clear
  C)
  \[Ca\] done clear
  D)
  \[Li\] done clear
  View Solution play_arrow

• question_answer54)
  Tincal is [Pb. PMT 2001]
  A)
  \[N{{a}_{2}}C{{O}_{3}}.\,10{{H}_{2}}O\] done clear
  B)
  \[NaN{{O}_{3}}\] done clear
  C)
  \[NaCl\] done clear
  D)
  \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.10{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer55)
  Which has minimum solubility [BHU 2003]
  A)
  \[B{{r}_{2}}{{S}_{3}}\] done clear
  B)
  \[A{{g}_{2}}S\] done clear
  C)
  CoS done clear
  D)
  PbS done clear
  View Solution play_arrow

• question_answer56)
  Cryolite helps in [BHU 2003]
  A)
  Lowering the melting point done clear
  B)
  Increasing the melting point done clear
  C)
  Increasing the electrical conductivity done clear
  D)
  Decreasing the electrical conductivity done clear
  View Solution play_arrow

• question_answer57)
  In certain matters lithium differs from other alkali metals, the main reason for this is [MP PET/PMT 1998]
  A)
  Small size of Li atom and \[L{{i}^{+}}\] ion done clear
  B)
  Extremely high electropositivity of \[Li\] done clear
  C)
  Greater hardness of \[Li\] done clear
  D)
  Hydration of \[L{{i}^{+}}\] ion done clear
  View Solution play_arrow

• question_answer58)
  Acidified potassium permanganate solution is decolourised by [UPSEAT 2001]
  A)
  Bleaching powder done clear
  B)
  Microcosmic salt done clear
  C)
  Mohr salt done clear
  D)
  White vitriol done clear
  View Solution play_arrow

• question_answer59)
  Which one of the following is used as a disinfectant in water treatment [NDA 1999]
  A)
  Alum done clear
  B)
  Charcoal done clear
  C)
  Kieselguhr done clear
  D)
  Potassium permanganate done clear
  View Solution play_arrow

• question_answer60)
  Sodium thiosulphate is used in photography [UPSEAT 1999]
  A)
  To convert metallic silver into silver salt done clear
  B)
  AgBr grain is reduced to non-metallic silver done clear
  C)
  To remove reduced silver done clear
  D)
  To remove undecomposed AgBr in the form of \[N{{a}_{3}}[Ag{{[{{S}_{2}}{{O}_{3}})}_{2}}]\] (a complex salt) done clear
  View Solution play_arrow

• question_answer61)
  Composition of borax is [UPSEAT 2001;04]
  A)
  \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.\,4{{H}_{2}}O\] done clear
  B)
  \[N{{a}_{2}}{{B}_{4}}{{O}_{7}}.\,10{{H}_{2}}O\] done clear
  C)
  \[NaB{{O}_{2}}\] done clear
  D)
  \[{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer62)
  When sodium dicarbonate is heated strongly for calcined in a kiln, it forms [CPMT 2000; KCET (Med.) 2000]
  A)
  \[Na\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
  \[NaC{{O}_{3}}\] done clear
  D)
  \[NaHC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer63)
  The strongest reducing agent is [MP PET 2001]
  A)
  K done clear
  B)
  Al done clear
  C)
  Mg done clear
  D)
  Br done clear
  View Solution play_arrow

• question_answer64)
  The word 'alkali' is used for alkali metals indicates [RPMT 1999]
  A)
  Ash of the plants done clear
  B)
  Metallic nature done clear
  C)
  Silvery lusture done clear
  D)
  Active metal done clear
  View Solution play_arrow

• question_answer65)
  Potassium nitrate is called [RPMT 1999]
  A)
  Mohr's salt done clear
  B)
  Gypsum done clear
  C)
  Indian salt petre done clear
  D)
  Chile salt petre done clear
  View Solution play_arrow

• question_answer66)
  Which of the following chemicals, in addition to water, are used for the manufacture of \[N{{a}_{2}}C{{O}_{3}}\] by Solvay process [Roorkee 1999]
  A)
  \[NaCl,CO\] and \[N{{H}_{3}}\] done clear
  B)
  \[NaCl,\,C{{O}_{2}}\] and \[N{{H}_{3}}\] done clear
  C)
  \[NaCl,\,N{{H}_{4}}Cl\] and \[C{{O}_{2}}\] done clear
  D)
  \[NaHC{{O}_{3}},\,CO\] and \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer67)
  Which metal forms amide with \[N{{H}_{3}}\] at \[{{300}^{o}}C\] [CPMT 1994]
  A)
  \[Mg\] done clear
  B)
  \[Pb\] done clear
  C)
  \[Al\] done clear
  D)
  \[Na\] done clear
  View Solution play_arrow

• question_answer68)
  When sodium is heated with moist air, then the product obtained is [AIIMS 1999]
  A)
  \[N{{a}_{2}}O\] done clear
  B)
  \[NaOH\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  D)
  \[N{{a}_{2}}{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer69)
  An inorganic compound first melts then resolidifies and then liberates a gas. It may be [DPMT 2002]
  A)
  \[Mn{{O}_{2}}\] done clear
  B)
  \[A{{l}_{2}}{{O}_{3}}\] done clear
  C)
  \[KMn{{O}_{4}}\] done clear
  D)
  \[KCl{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer70)
  On dissolving moderate amount of sodium metal in liquid \[N{{H}_{3}}\] at low temperature, which one of the following does not occur [AIIMS 2003]
  A)
  Blue coloured solution is obtained done clear
  B)
  \[N{{a}^{+}}\] ions are formed in the solution done clear
  C)
  Liquid \[N{{H}_{3}}\] becomes good conductor of electricity done clear
  D)
  Liquid ammonia remains diamagnetic done clear
  View Solution play_arrow

• question_answer71)
  The solubility of the alkali metal carbonates [Pune CET 1998]
  A)
  Increases at first and then decreases done clear
  B)
  Does not show regular variation done clear
  C)
  Increases as we go down the group done clear
  D)
  Decreases as we go down the group done clear
  View Solution play_arrow

• question_answer72)
  Which of the following properties is not true for an alkali metal [Pune CET 1998]
  A)
  Low atomic volume done clear
  B)
  Low ionization energy done clear
  C)
  Low density done clear
  D)
  Low electronegativity done clear
  View Solution play_arrow

• question_answer73)
  Which of the following alkali metals has the biggest tendency for the half reaction, \[C{{O}_{2}}\] [DPMT 2001]
  A)
  Lithium done clear
  B)
  Sodium done clear
  C)
  Cesium done clear
  D)
  Potassium done clear
  View Solution play_arrow

• question_answer74)
  Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
  A)
  \[Zn{{(OH)}_{2}}\] done clear
  B)
  \[Al{{(OH)}_{3}}\] done clear
  C)
  \[Fe{{(OH)}_{3}}\] done clear
  D)
  \[Pb{{(OH)}_{2}}\] done clear
  View Solution play_arrow

• question_answer75)
  Which one of the following on heating will not give \[C{{O}_{2}}\] [NDA 1999; BHU 2000]
  A)
  \[CaC{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
  \[PbC{{O}_{3}}\] done clear
  D)
  \[L{{i}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer76)
  NaOH is prepared by the method [AFMC 2005]
  A)
  Down?s cell done clear
  B)
  Castner cell done clear
  C)
  Solvay process done clear
  D)
  Castner Kellner cell done clear
  View Solution play_arrow

• question_answer77)
  Sodium gives blue colour with \[N{{H}_{3}}\] solution, this blue colour is due to [UPSEAT 2000,02; AMU 2002; RPMT 2002]
  A)
  Ammoniated \[N{{a}^{\oplus }}\] done clear
  B)
  Ammoniated \[N{{a}^{\Theta }}\] done clear
  C)
  Ammoniated \[{{e}^{-}}\] done clear
  D)
  \[N{{a}^{+}}/N{{a}^{-}}\]pair done clear
  View Solution play_arrow

• question_answer78)
  The strongest reducing agent of the alkali metal is [CPMT 1999; Pb.CET 2001]
  A)
  Li done clear
  B)
  Na done clear
  C)
  K done clear
  D)
  Cs done clear
  View Solution play_arrow

• question_answer79)
  With the increase in atomic weights, melting points of the alkali metals [MP PMT 1995]
  A)
  Increase done clear
  B)
  Decrease done clear
  C)
  Remain constant done clear
  D)
  Do not show definite trend done clear
  View Solution play_arrow

• question_answer80)
  The reaction of water with sodium and potassium is [BHU 1999]
  A)
  Exothermic done clear
  B)
  Endothermic done clear
  C)
  Reversible done clear
  D)
  Irreversible and endothermic done clear
  View Solution play_arrow

• question_answer81)
  When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is [CBSE PMT PMT 1999; KCET 2000]
  A)
  Ammonia done clear
  B)
  Sulphur dioxide done clear
  C)
  Carbon dioxide done clear
  D)
  Carbon monoxide done clear
  View Solution play_arrow

• question_answer82)
  Characteristic feature of alkali metals is [RPMT 2000; MP PMT 2004]
  A)
  Good conductor of heat and electricity done clear
  B)
  High melting points done clear
  C)
  Low oxidation potentials done clear
  D)
  High ionization potentials done clear
  View Solution play_arrow

• question_answer83)
  A substance X  is a compound of an element of group IA the substance X gives a violet colour in flame test, X is [MP PMT 1980, 85, 86; CPMT 1985; DCE 2000]
  A)
  \[LiCl\] done clear
  B)
  \[NaCl\] done clear
  C)
  \[KCl\] done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer84)
  Which of the following alkali metal ions has lowest ionic mobility in aqueous solution [KCET 2000]
  A)
  \[R{{b}^{+}}\] done clear
  B)
  \[C{{s}^{+}}\] done clear
  C)
  \[L{{i}^{+}}\] done clear
  D)
  \[N{{a}^{+}}\] done clear
  View Solution play_arrow

• question_answer85)
  Lithium shows similarities to magnesium in its chemical behaviour because [Pb. PMT 2000]
  A)
  Similar size, greater electronegativity and similar polarizing power. done clear
  B)
  Similar size same electronegativity and lower polarizing power done clear
  C)
  Similar size, same electronegativity and similar high polarizing power done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer86)
  Which one of the following is the most electropositive element [Pb. PMT 2000]
  A)
  Calcium done clear
  B)
  Chlorine done clear
  C)
  Potassium done clear
  D)
  Carbon done clear
  View Solution play_arrow

• question_answer87)
  Electrolysis of molten sodium chloride leads to the formation of [KCET 1990]
  A)
  \[Na\] and \[{{H}_{2}}\] done clear
  B)
  \[Na\] and \[{{O}_{2}}\] done clear
  C)
  \[{{H}_{2}}\] and \[{{O}_{2}}\] done clear
  D)
  \[Na\] and \[C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer88)
  When sodium bicarbonate is heated the product obtained is [Pb. CET 2000; DCE 2004]
  A)
  Na done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  C)
  \[NaC{{O}_{3}}\] done clear
  D)
  \[N{{a}_{2}}(HC{{O}_{3}})\] done clear
  View Solution play_arrow

• question_answer89)
  Which of the following is a use of alum [CPMT 2004]
  A)
  Making explosives done clear
  B)
  Bleaching clothes done clear
  C)
  Water softening done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer90)
  Which of the following salt does not get hydrolysed in water [CPMT 2004]
  A)
  \[KCl{{O}_{4}}\] done clear
  B)
  \[N{{H}_{4}}Cl\] done clear
  C)
  \[C{{H}_{3}}COONa\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer91)
  A fire of lithium, sodium and potassium can be extinguished by  [DCE 2003]
  A)
  \[{{H}_{2}}O\] done clear
  B)
  Nitrogen done clear
  C)
  \[C{{O}_{2}}\] done clear
  D)
  Asbestos blanket done clear
  View Solution play_arrow

• question_answer92)
  Which of the following metal has stable carbonates [AFMC 2004]
  A)
  Na done clear
  B)
  Mg done clear
  C)
  Al done clear
  D)
  Si done clear
  View Solution play_arrow

• question_answer93)
  Aluminium reacts with caustic soda to form [DCE 2004]
  A)
  Aluminium hydroxide done clear
  B)
  Aluminium oxide done clear
  C)
  Sodium meta-aluminate done clear
  D)
  Sodium tetra aluminate done clear
  View Solution play_arrow

• question_answer94)
  Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth's metal, is  [BHU 2004]
  A)
  Stronger done clear
  B)
  Weaker done clear
  C)
  Volatile done clear
  D)
  Not present done clear
  View Solution play_arrow

• question_answer95)
  Which of the following is a false statement  [CPMT 2004]
  A)
  Fluorine is more electronegative than chlorine done clear
  B)
  Nitrogen has greater \[\text{I}{{\text{E}}_{1}}\]than oxygen done clear
  C)
  Lithium is amphoteric done clear
  D)
  Chlorine is an oxidising agent done clear
  View Solution play_arrow

• question_answer96)
  Which is most basic in character   [UPSEAT 2004]
  A)
  \[CsOH\] done clear
  B)
  KOH done clear
  C)
  NaOH done clear
  D)
  LiOH done clear
  View Solution play_arrow

• question_answer97)
  Photoelectric effect is maximum in  [AFMC 2004]
  A)
  \[Cs\] done clear
  B)
  Na done clear
  C)
  K done clear
  D)
  Li done clear
  View Solution play_arrow

• question_answer98)
  A metal M reacts with \[{{N}_{2}}\] to give a compound 'A' \[({{M}_{3}}N)\]. 'A' on heating at high temperature gives back 'M' and 'A' on reacting with \[{{H}_{2}}O\]gives a gas 'B'. 'B' turns \[CuS{{O}_{4}}\]solution blue on passing through it. A and B can be  [DCE 2003]
  A)
  Al and \[N{{H}_{3}}\] done clear
  B)
  Li and \[N{{H}_{3}}\] done clear
  C)
  Na and \[N{{H}_{3}}\] done clear
  D)
  Mg and \[N{{H}_{3}}\] done clear
  View Solution play_arrow

• question_answer99)
  A solid compound 'X' on heating gives \[C{{O}_{2}}\] gas and a residue. The residue mixed with water forms 'Y'. On passing an excess of \[C{{O}_{2}}\]through 'Y' in water, a clear solution, 'Z' is obtained. On boiling 'Z', compound 'X' is reformed. The compound 'X' is        [CBSE PMT 2004]
  A)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  B)
  \[{{K}_{2}}C{{O}_{3}}\] done clear
  C)
  \[Ca{{(HC{{O}_{3}})}_{2}}\] done clear
  D)
  \[CaC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer100)
  mongst \[LiCl,\ RbCl,\ BeC{{l}_{2}}\] and \[MgC{{l}_{2}}\]the compounds with the greatest and least ionic character respectively are [Pb. CET 2004]
  A)
  \[LiCl\] and \[RbCl\] done clear
  B)
  \[MgC{{l}_{2}}\]and \[BeC{{l}_{2}}\] done clear
  C)
  \[RbCl\] and \[BeC{{l}_{2}}\] done clear
  D)
  \[RbCl\] and \[MgC{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer101)
  Salt  cake is
  A)
  Sodium sulphate done clear
  B)
  Sodium chloride done clear
  C)
  Sodium bisulphite done clear
  D)
  Sodium sulphate and Sodium chloride done clear
  View Solution play_arrow

• question_answer102)
  Globar salt is [BHU 1983; CPMT 1988, 91;  IIT 1985; MP PET 2000]
  A)
  \[MgS{{O}_{4}}.7{{H}_{2}}O\] done clear
  B)
  \[CuS{{O}_{4}}.\,5{{H}_{2}}O\] done clear
  C)
  \[FeS{{O}_{4}}.7{{H}_{2}}O\] done clear
  D)
  \[N{{a}_{2}}S{{O}_{4}}.\,10{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer103)
  The colour given to the flame by sodium salts  is [CPMT 1980; MP PET 1986]
  A)
  Light red done clear
  B)
  Golden yellow done clear
  C)
  Green done clear
  D)
  Pink done clear
  View Solution play_arrow

• question_answer104)
  Solvay's process is used for the preparation of [CPMT 1982; AIIMS 1987]
  A)
  Ammonia done clear
  B)
  Sodium bicarbonate done clear
  C)
  Sodium carbonate done clear
  D)
  Calcium carbonate done clear
  View Solution play_arrow

• question_answer105)
  Sodium when heated in a current of dry ammonia gives [NCERT 1981; KCET 2000]
  A)
  Sodium nitrite done clear
  B)
  Sodium hydride done clear
  C)
  Sodium amide done clear
  D)
  Sodium azide done clear
  View Solution play_arrow

• question_answer106)
  Washing soda is [CPMT 1982; DPMT 1982; CBSE PMT 1990; MP PMT 1987, 96]
  A)
  \[N{{a}_{2}}C{{O}_{3}}.\,10{{H}_{2}}O\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}.{{H}_{2}}O\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}.\,5{{H}_{2}}O\] done clear
  D)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer107)
  The substance used to decolourise  and purify oils is [MP PMT 1987]
  A)
  Sodium carbonate done clear
  B)
  Sodium chloride done clear
  C)
  Sodium hydroxide done clear
  D)
  Sodium sulphate done clear
  View Solution play_arrow

• question_answer108)
  The main salt soluble in sea water is [MP PMT 1998]
  A)
  \[MgC{{l}_{2}}\] done clear
  B)
  \[NaCl\] done clear
  C)
  \[MgS{{O}_{4}}\] done clear
  D)
  \[CaS{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer109)
  The metallic lustre exhibited by sodium is explained by [IIT 1987]
  A)
  Diffusion of sodium ions done clear
  B)
  Oscillation of loose electrons done clear
  C)
  Excitation of free protons done clear
  D)
  Existence of body centred cubic lattice done clear
  View Solution play_arrow

• question_answer110)
  The metal which reacts with water at room temperature is [CPMT 1985; MP PMT 1996; MP PET 1998]
  A)
  Copper done clear
  B)
  Iron done clear
  C)
  Magnesium done clear
  D)
  Sodium done clear
  View Solution play_arrow

• question_answer111)
  When \[NaCl\] is dissolved in water, the sodium ion is [CPMT 1989]
  A)
  Oxidised done clear
  B)
  Reduced done clear
  C)
  Hydrolysed done clear
  D)
  Hydrated done clear
  View Solution play_arrow

• question_answer112)
  Sodium metal cannot be stored under [CPMT 1985, 88, 94]
  A)
  Benzene done clear
  B)
  Kerosene done clear
  C)
  Alcohol done clear
  D)
  Toluene done clear
  View Solution play_arrow

• question_answer113)
  Causticization process is used for the preparation of [CPMT 1985; BHU 1986]
  A)
  Caustic soda done clear
  B)
  Caustic potash done clear
  C)
  Baryta done clear
  D)
  Slaked lime done clear
  View Solution play_arrow

• question_answer114)
  When \[CO\] is passed over solid \[NaOH\] heated to \[{{200}^{o}}C\], it forms [MP PMT 1985]
  A)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  B)
  \[NaHC{{O}_{3}}\] done clear
  C)
  \[HCOONa\] done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer115)
  \[NaOH\] is manufactured by electrolysis of brine solution. The products of the reaction are [KCET 1990]
  A)
  \[C{{l}_{2}}\] and \[{{H}_{2}}\] done clear
  B)
  \[C{{l}_{2}}\] and \[Na-Hg\] done clear
  C)
  \[C{{l}_{2}}\] and \[Na\] done clear
  D)
  \[C{{l}_{2}}\] and \[{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer116)
  Sodium carbonate is manufactured by Solvay process, the products that are recycled are [KCET 1993; DCE 1999]
  A)
  \[C{{O}_{2}}\] and \[N{{H}_{3}}\] done clear
  B)
  \[C{{O}_{2}}\] and \[N{{H}_{4}}Cl\] done clear
  C)
  \[NaCl,\,CaO\] done clear
  D)
  \[CaC{{l}_{2}},\,CaO\] done clear
  View Solution play_arrow

• question_answer117)
  The useful bye-products, obtained in the Solvay process of manufacturing sodium carbonate, are [KCET 1989, 93]
  A)
  Quick lime and \[C{{O}_{2}}\] done clear
  B)
  \[NaHC{{O}_{3}}\] and \[N{{H}_{4}}Cl\] done clear
  C)
  \[N{{H}_{4}}Cl\] solution and quick lime done clear
  D)
  \[NaHC{{O}_{3}}\] and \[C{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer118)
  In the preparation of sodium carbonate, which of the following is used [AFMC 1992]
  A)
  Slaked lime done clear
  B)
  Quick lime done clear
  C)
  Lime stone done clear
  D)
  \[NaOH\] done clear
  View Solution play_arrow

• question_answer119)
  When \[NaOH\] crystals are left in open air, they acquire a fluid layer around each crystal as [CPMT 1974]
  A)
  They start melting done clear
  B)
  They absorb moisture from air done clear
  C)
  They react with air to form a liquid compound done clear
  D)
  They absorb \[C{{O}_{2}}\] from air done clear
  View Solution play_arrow

• question_answer120)
  Sodium carbonate reacts with \[S{{O}_{2}}\] in aqueous medium to give [MP PMT 1982, 85]
  A)
  \[NaHS{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}S{{O}_{3}}\] done clear
  C)
  \[NaHS{{O}_{4}}\] done clear
  D)
  \[N{{a}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer121)
  Baking soda is [CPMT 1974, 78, 79, 91; BHU 1979; Manipal MEE 1995; AIIMS 1996; CPMT 1973; RPET 1999; AFMC 2001, 05; Pb. CET 2002]
  A)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  B)
  \[NaHC{{O}_{3}}\] done clear
  C)
  \[N{{a}_{2}}S{{O}_{4}}\] done clear
  D)
  \[{{K}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer122)
  Soda ash is [KCET 1993]
  A)
  \[N{{a}_{2}}C{{O}_{3}}.{{H}_{2}}O\] done clear
  B)
  \[NaOH\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  D)
  \[NaHC{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer123)
  Soda lime is [KCET 1993]
  A)
  \[NaOH\] done clear
  B)
  \[CaO\] done clear
  C)
  \[NaOH\] and \[CaO\] done clear
  D)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer124)
  Molten sodium is used in nuclear reactors to [KCET 1989]
  A)
  Absorb neutrons in order to control the chain reaction done clear
  B)
  Slow down the fast neutrons done clear
  C)
  Absorb the heat generated by nuclear fission done clear
  D)
  Extract radio-isotopes produced in the reactor done clear
  View Solution play_arrow

• question_answer125)
  Squashes are stored by adding [AFMC 1989]
  A)
  Citric acid done clear
  B)
  \[KCl\] done clear
  C)
  \[N{{a}_{2}}S{{O}_{3}}\] done clear
  D)
  Sodium metabisulphite done clear
  View Solution play_arrow

• question_answer126)
  Sodium thiosulphate \[(N{{a}_{2}}{{S}_{2}}{{O}_{3}}.5{{H}_{2}}O)\] is used in photography to [CPMT 1972, 74, 79; DPMT 1983; Bihar CEE 1995; MNR 1995]
  A)
  Reduce silver bromide to metallic silver done clear
  B)
  Convert metallic silver to silver salt done clear
  C)
  Remove undecomposed \[AgBr\]as a soluble silver thisulphate complex done clear
  D)
  Remove unreduced silver done clear
  View Solution play_arrow

• question_answer127)
  Which of the following pair can't exist in solution [IIT 1986; DCE 1999]
  A)
  \[NaHC{{O}_{3}}\] and \[NaOH\] done clear
  B)
  \[N{{a}_{2}}C{{O}_{3}}\] and \[NaOH\] done clear
  C)
  \[N{{a}_{2}}C{{O}_{3}}\] and \[NaCl\] done clear
  D)
  \[NaHC{{O}_{3}}\] and \[NaCl\] done clear
  View Solution play_arrow

• question_answer128)
  Sodium thiosulphate is prepared by [IIT 1996]
  A)
  Reducing \[N{{a}_{2}}S{{O}_{4}}\] solution with \[{{H}_{2}}S\] done clear
  B)
  Boiling \[N{{a}_{2}}S{{O}_{3}}\] solution with \[S\] in alkaline medium done clear
  C)
  Neutralising \[{{H}_{2}}{{S}_{2}}{{O}_{3}}\] solution with \[NaOH\] done clear
  D)
  Boiling \[N{{a}_{2}}S{{O}_{3}}\] solution with \[S\] in acidic medium done clear
  View Solution play_arrow

• question_answer129)
  When \[NaOH\] is prepared, the gas released is [CPMT 1996]
  A)
  \[C{{l}_{2}}\] done clear
  B)
  \[{{H}_{2}}\] done clear
  C)
  \[{{O}_{2}}\] done clear
  D)
  \[{{H}_{2}}O\] done clear
  View Solution play_arrow

• question_answer130)
  What is lye [BHU 1997]
  A)
  10% solution of \[NaCl\] done clear
  B)
  10% solution of \[KOH\] done clear
  C)
  10% solution of \[Ca{{(OH)}_{2}}\] done clear
  D)
  10% solution of \[N{{a}_{2}}C{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer131)
  \[Na\] imparts yellow colour to Bunsen flame because of [RPMT 1997]
  A)
  Low ionisation potential done clear
  B)
  Sensitivity done clear
  C)
  Sublimation done clear
  D)
  Absorbed high radiation done clear
  View Solution play_arrow

• question_answer132)
  \[Sn\] is dissolved in excess of \[NaOH\] solution, the compound obtained is [RPMT 1997]
  A)
  \[Sn{{(OH)}_{2}}\] done clear
  B)
  \[N{{a}_{2}}Sn{{O}_{3}}\] done clear
  C)
  \[N{{a}_{2}}Sn{{O}_{2}}\] done clear
  D)
  \[Sn{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer133)
  Identify the correct statement [CPMT 1997]
  A)
  Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride done clear
  B)
  Elemental sodium is a strong oxidizing agent done clear
  C)
  Elemental sodium is insoluble in ammonia done clear
  D)
  Elemental sodium is easily oxidized done clear
  View Solution play_arrow

• question_answer134)
  Calcium is obtained by [CBSE PMT 1997]
  A)
  Roasting of limestone done clear
  B)
  Electrolysis of solution of calcium chloride in \[{{H}_{2}}O\] done clear
  C)
  Reduction of calcium chloride with carbon done clear
  D)
  Electrolysis of molten anhydrous calcium chloride done clear
  View Solution play_arrow

• question_answer135)
  When sodium chloride solution is electrolysed, the gas that is liberated at the cathode is [Kurukshetra CEE 1998]
  A)
  Oxygen done clear
  B)
  Hydrogen done clear
  C)
  Chlorine done clear
  D)
  Air done clear
  View Solution play_arrow

• question_answer136)
  During the electrolysis of fused sodium chloride, the anodic reaction is [KCET 1998]
  A)
  Reduction of sodium ions done clear
  B)
  Oxidation of sodium ions done clear
  C)
  Reduction of chloride ions done clear
  D)
  Oxidation of chloride ions done clear
  View Solution play_arrow

• question_answer137)
  Which of the following does not participate in the Solvey's process for the manufacture of \[N{{a}_{2}}C{{O}_{3}}\] [EAMCET 1998]
  A)
  \[N{{H}_{3}}\] done clear
  B)
  \[NaCl\] solution done clear
  C)
  \[C{{O}_{2}}\] done clear
  D)
  \[{{H}_{2}}S{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer138)
  The colour of the precipitate produced by adding \[NaOH\] solution to \[HgC{{l}_{2}}\]is [KCET 1998]
  A)
  Yellow done clear
  B)
  Black done clear
  C)
  Brown done clear
  D)
  White done clear
  View Solution play_arrow

• question_answer139)
  The cell used for the electrolysis of fused \[NaCl\]is [AFMC 1999; Kerala (Mea.) 2002]
  A)
  Down?s cell done clear
  B)
  Castner cell done clear
  C)
  Solvay cell done clear
  D)
  Nelson cell done clear
  View Solution play_arrow

• question_answer140)
  Slaked lime \[[Ca{{(OH)}_{2}}]\] is used in the manufacture [UPSEAT 2000]
  A)
  Cement done clear
  B)
  Fire bricks done clear
  C)
  Pigment done clear
  D)
  Medicine done clear
  View Solution play_arrow

• question_answer141)
  The alum used for purifying water is [KCET (Med.) 2001]
  A)
  Ferric alum done clear
  B)
  Chrome alum done clear
  C)
  Potash alum done clear
  D)
  Ammonium alum done clear
  View Solution play_arrow

• question_answer142)
  Which one of the following metalic hydroxides does not dissolve in sodium hydroxide solution [KCET (Med.) 2001]
  A)
  \[Zn{{(OH)}_{2}}\] done clear
  B)
  \[Al\,{{(OH)}_{3}}\] done clear
  C)
  \[Fe{{(OH)}_{3}}\] done clear
  D)
  \[Pb{{(OH)}_{2}}\] done clear
  View Solution play_arrow

• question_answer143)
  In which of the following processes, fused sodium hydroxide is electrolysed at a \[{{330}^{o}}C\]temperature for extraction of sodium [CBSE PMT 2000; AFMC 2001]
  A)
  Castner's process done clear
  B)
  Down's process done clear
  C)
  Cyanide process done clear
  D)
  Both b and c done clear
  View Solution play_arrow

• question_answer144)
  Excess of \[N{{a}^{+}}\]ions in our system causes [KCET (Med.) 2001]
  A)
  High B.P. done clear
  B)
  Low B.P. done clear
  C)
  Diabetes done clear
  D)
  Anaemia done clear
  View Solution play_arrow

• question_answer145)
  Ferric alum has the composition \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}.F{{e}_{2}}{{(S{{O}_{4}})}_{3}}.x{{H}_{2}}O\] [Orissa JEE 2002]
  A)
  7 done clear
  B)
  24 done clear
  C)
  6 done clear
  D)
  15 done clear
  View Solution play_arrow

• question_answer146)
  If \[Na\]is heated in presence of air, it forms [AFMC 2002]
  A)
  \[N{{a}_{2}}C{{O}_{3}}\] done clear
  B)
  \[N{{a}_{2}}{{O}_{2}}\] done clear
  C)
  \[N{{a}_{2}}O\] done clear
  D)
  Both b and c done clear
  View Solution play_arrow

• question_answer147)
  Which of the following is most reducing agent [RPMT 2002]
  A)
  \[HN{{O}_{3}}\] done clear
  B)
  \[Na\] done clear
  C)
  \[C{{l}_{2}}\] done clear
  D)
  \[Cr\] done clear
  View Solution play_arrow

• question_answer148)
  Pyrolusite is [DPMT 2002]
  A)
  Carbonate ore done clear
  B)
  Sulphur ore done clear
  C)
  Silicon ore done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer149)
  In the manufacture of metallic sodium by the fused salt electrolysis (Down's process) a small amount of calcium chloride is added to [MP PET 1993; MP PMT 1994]
  A)
  Improve the electrical conduction done clear
  B)
  Increase the temperature of electrolysis done clear
  C)
  Bring down the melt temperature done clear
  D)
  Stabilize the metallic sodium done clear
  View Solution play_arrow

• question_answer150)
  Sodium metal is extracted by [MP PMT 1996]
  A)
  Electrolysis of aqueous solution of sodium chloride done clear
  B)
  Electrolysis of fused sodium chloride done clear
  C)
  Heating sodium oxide with carbon done clear
  D)
  Heating sodium oxide with hydrogen done clear
  View Solution play_arrow