JEE Main & Advanced Chemistry The p-block Elements-II / p-ब्लॉक तत्व-II Question Bank

done Self Evaluation Test - The p-Block Elements (Group 13 and Group 14) Total Questions - 60

• question_answer1)
  Which of the following hydroxide is acidic?
  A)
  \[Al{{\left( OH \right)}_{3}}\]        done clear
  B)
  \[Ca{{\left( OH \right)}_{3}}\] done clear
  C)
  \[Tl{{\left( OH \right)}_{3}}\]                  done clear
  D)
  \[B{{\left( OH \right)}_{3}}\] done clear
  View Solution play_arrow

• question_answer2)
  Al is more reactive than Fe but Al is less easily corroded than Fe because
  A)
  it is a noble metal done clear
  B)
  oxygen forms a protective oxide layer done clear
  C)
  iron undergoes reaction easily with water done clear
  D)
  Fe form mono and divalent ions. done clear
  View Solution play_arrow

• question_answer3)
  Often a ground glass stopper gets stuck in the neck of a glass bottle containing \[NaOH\] solution. This is due to:
  A)
  The presence of dirt particles in between. done clear
  B)
  The formation of solid silicate in between by the reaction of \[Si{{O}_{2}}\] of glass with \[NaOH.\] done clear
  C)
  The formation of \[N{{a}_{2}}C{{\text{O}}_{3}}\] in between by the reaction of \[C{{O}_{2}}\] of air and \[NaOH.\] done clear
  D)
  Glass contains a boron compound which forms a precipitate with the \[NaOH\] solution. done clear
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• question_answer4)
  \[\left( S{{i}_{2}}{{O}_{5}} \right)_{n}^{2n-}\] anion is obtained when:
  A)
  no oxygen of a \[SiO_{4}^{4-}\] 'tetrahedron is shared with another \[SiO_{4}^{4-}\] tetrahedron done clear
  B)
  one oxygen of a \[SiO_{4}^{4-}\] tetrahedron is shared with another \[SiO_{4}^{4-}\] tetrahedron done clear
  C)
  two oxygen of a \[SiO_{4}^{4-}\] tetrahedron are shared with another \[SiO_{4}^{4-}\] tetrahedron done clear
  D)
  three oxygen of a \[SiO_{4}^{4-}\] tetrahedron are shared with another \[SiO_{4}^{4-}\] tetrahedron done clear
  View Solution play_arrow

• question_answer5)
  Boric acid is a weak monobasic acid and acts as Lewis acid
  A)
  By donating \[{{H}^{+}}\] done clear
  B)
  By accepting \[O{{H}^{-}}\] done clear
  C)
  By donating lone pair of electrons done clear
  D)
  By accepting lone pair of electrons. done clear
  View Solution play_arrow

• question_answer6)
  The incorrect statement regarding above reactions is: 
  A)
  Al shows amphoteric character done clear
  B)
  Gas 'P' and 'Q' are different done clear
  C)
  Both X and Y are water soluble done clear
  D)
  Gas Q is inflammable done clear
  View Solution play_arrow

• question_answer7)
  Ge(II)compounds are powerful reducing agents whereas Pb(IV)compounds are strong oxidants. It is because
  A)
  Pb is more electropositive than Ge done clear
  B)
  ionization potential of lead is less than that of Ge done clear
  C)
  ionic radii of \[P{{b}^{2+}}\]and \[P{{b}^{4+}}\] are larger than those of \[G{{e}^{2+}}\] and \[G{{e}^{4+}}\] done clear
  D)
  of more pronounced inert pair effect in lead than in Ge done clear
  View Solution play_arrow

• question_answer8)
  Which of the following conceivable structures for \[CC{{l}_{4}}\] will have a zero dipole moment?
  A)
  Square planar done clear
  B)
  Square pyramid (carbon at apex) done clear
  C)
  Irregular tetrahedron done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer9)
  Least thermally stable is - 
  A)
  \[CC{{l}_{4}}\]             done clear
  B)
  \[SiC{{l}_{4}}\] done clear
  C)
  \[GeC{{l}_{4}}\]                       done clear
  D)
  \[GeB{{r}_{4}}\] done clear
  View Solution play_arrow

• question_answer10)
  To a piece of charcoal, sulphuric acid is added. Then:
  A)
  there is no reaction done clear
  B)
  water gas is formed done clear
  C)
  \[S{{O}_{2}}\] and \[C{{O}_{2}}\] are evolved done clear
  D)
  CO and \[S{{O}_{2}}\] are evolved done clear
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• question_answer11)
  The correct statement with respect to CO is
  A)
  it combines with \[{{H}_{2}}O\] to give carbonic acid done clear
  B)
  it reacts with haemoglobin in RBC done clear
  C)
  it is powerful oxidising agent done clear
  D)
  it is used to prepare aerated drinks done clear
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• question_answer12)
  \[C{{O}_{2}}\] and \[{{N}_{2}}\] are non-supporters of combustion. However for putting out fires \[C{{O}_{2}}\] is preferred over \[{{N}_{2}}\] because \[C{{O}_{2}}\]
  A)
  does not burn done clear
  B)
  forms non-combustible products with burning substances done clear
  C)
  is denser than nitrogen done clear
  D)
  is a more reactive gas done clear
  View Solution play_arrow

• question_answer13)
  Which of the following is not correct?
  A)
  \[Ge{{(OH)}_{2}}\] is amphoteric done clear
  B)
  \[GeC{{l}_{2}}\] is more stable than \[GeC{{l}_{4}}\] done clear
  C)
  \[Ge{{O}_{2}}\] is weakly acidic done clear
  D)
  \[GeC{{l}_{4}}\] in \[HCl\] forms \[{{[GeC{{l}_{2}}]}^{2-}}\]  ion done clear
  View Solution play_arrow

• question_answer14)
  Which of the following is similar to graphite?
  A)
  B    done clear
  B)
  BN    done clear
  C)
  \[{{B}_{2}}{{H}_{6}}\]                       done clear
  D)
  \[{{B}_{4}}C\] done clear
  View Solution play_arrow

• question_answer15)
  In the following sets of reactants which two sets best exhibit the amphoteric characters of

  \[A{{l}_{2}}{{O}_{3}}.x{{H}_{2}}O~\]

  Set 1: \[A{{l}_{2}}{{O}_{3}}.x{{H}_{2}}O(s)\,and\,O{{H}^{-}}(aq)\]

  Set 2: \[A{{l}_{2}}{{O}_{3}}.x{{H}_{2}}O(s)\,and\,{{H}_{2}}O(l)\]

  Set 3: \[A{{l}_{2}}{{O}_{3}}.x{{H}_{2}}O(s)\,and\,{{H}^{+}}(aq)\]

  Set 4: \[A{{l}_{2}}{{O}_{3}}.x{{H}_{2}}O(s)\,and\,N{{H}_{3}}(aq)\]

  A)
  1 and 2             done clear
  B)
  1 and 3 done clear
  C)
  2 and 4             done clear
  D)
  3 and 4 done clear
  View Solution play_arrow

• question_answer16)
  The gas evolved on heating \[Ca{{F}_{2}}\] and \[Si{{O}_{2}}\]with concentrated \[{{H}_{2}}S{{O}_{4}}\] on hydrolysis gives a white gelatinous precipitate. The precipitate is:
  A)
  hydrofluosilicic acid done clear
  B)
  silica gel done clear
  C)
  silicic acid done clear
  D)
  calciumfluorosilicate done clear
  View Solution play_arrow

• question_answer17)
  On adding ammonium hydroxide solution to \[A{{l}_{2}}{{(S{{O}_{4}})}_{3}}(aq)\]: 
  A)
  A precipitate is formed which does not dissolve in excess of ammonium hydroxide done clear
  B)
  A precipitate is formed which dissolves in excess of ammonia solution done clear
  C)
  No precipitate is formed done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer18)
  Which of the following statements are correct?

  (i) Aluminium forms \[{{[Al{{F}_{6}}]}^{3-}}\] ion while boron forms only \[{{[B{{F}_{4}}]}^{-}}\] ion due to presence of d-orbitals in aluminium.

  (ii) The first member of a group differs from the heavier members in its ability to form \[p\pi -p\pi \] multiple bonds to itself and to other second row elements. While heavier member forms \[d\pi -p\pi \] bonds.

  (iii) d-orbitals contribute more to the overall stability of molecules than \[p\pi -p\pi \] bonding of second row elements.

  A)
  (i) (ii) (iii)                        done clear
  B)
  (i) (iii) done clear
  C)
  (i) (ii)                 done clear
  D)
  (ii) (iii) done clear
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• question_answer19)
  An aqueous solution of \[FeS{{O}_{4}},A{{l}_{2}}{{(S{{O}_{4}})}_{3}}\] and chrome alum is heated with excess of \[N{{a}_{2}}{{O}_{2}}\] and filtered. The materials obtained are:
  A)
  a colourless filtrate and a green residue done clear
  B)
  a yellow filtrate and a green residue done clear
  C)
  a yellow filtrate and a brown residue done clear
  D)
  a green filtrate and a brown residue done clear
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• question_answer20)
  Which statement is not true about potash alum?
  A)
  On heating it melts and loses its water of crystallization. done clear
  B)
  It's aqueous solution is basic in nature. done clear
  C)
  It is used in dyeing industries. done clear
  D)
  It's empirical formula is \[KAl{{\left( S{{O}_{4}} \right)}_{2}}.12{{H}_{2}}O.\] done clear
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• question_answer21)
  Anhydrous aluminium chloride \[(A{{l}_{2}}C{{l}_{6}})\] is covalent compound and soluble in water giving:
  A)
  \[A{{l}^{3+}}\] and \[C{{l}^{-}}\]ions done clear
  B)
  \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}\] and \[C{{l}^{-}}\] ions done clear
  C)
  \[{{[AlC{{l}_{2}}{{({{H}_{2}}O)}_{4}}]}^{3+}}\] and \[{{[AlC{{l}_{4}}{{({{H}_{2}}O)}_{2}}]}^{-}}\] ions done clear
  D)
  none of the above done clear
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• question_answer22)
  Borax is converted into crystalline boron by the following steps: \[Borax\xrightarrow{X}{{H}_{3}}B{{O}_{3}}\xrightarrow{\Delta }{{B}_{2}}{{O}_{3}}\xrightarrow[\Delta ]{Y}B\] X and Y are respectively:
  A)
  \[HCl,Mg\]         done clear
  B)
  \[HCl,C\] done clear
  C)
  \[C,Al\]                          done clear
  D)
  \[HCl,Al\] done clear
  View Solution play_arrow

• question_answer23)
  On controlled hydrolysis and condensation, \[{{R}_{3}}SiCl\] yields
  A)
  \[{{R}_{3}}Si-O-Si{{R}_{3}}\] done clear
  B)
  \[-({{R}_{3}}Si-O-Si{{R}_{3}}){{-}_{n}}\] done clear
  C)
  \[{{R}_{3}}SiOH\] done clear
  D)
  done clear
  View Solution play_arrow

• question_answer24)
  \[B{{(OH)}_{3}}+NaOH\to NaB{{O}_{2}}+Na[B{{(OH)}_{4}}+{{H}_{2}}O\] How can this reaction is made to proceed in forward direction?
  A)
  addition of cis 1,2-diol done clear
  B)
  addition of borax done clear
  C)
  addition of trans 1,2-diol done clear
  D)
  addition of \[N{{a}_{2}}HP{{O}_{4}}\] done clear
  View Solution play_arrow

• question_answer25)
  Anhydrous \[AlC{{l}_{3}}\] cannot be obtained from which of the following reactions? 
  A)
  Heating \[AlC{{l}_{3}}.6{{H}_{2}}O\] done clear
  B)
  By passing dry \[HCl\] over hot aluminium powder done clear
  C)
  By passing dry \[C{{l}_{2}}\] over hot aluminium powder done clear
  D)
  By passing dry \[C{{l}_{2}}\] over a hot mixture of alumina and coke done clear
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• question_answer26)
  The role of fluorspar \[(Ca{{F}_{2}})\] which is added in small quantities in the electrolytic reduction of alumina dissolved in fused cryolite \[(N{{a}_{3}}Al{{F}_{6}})\] is
  A)
  as a catalyst done clear
  B)
  to make the fused mixture very conducting done clear
  C)
  to increase the temperature of the melt. done clear
  D)
  to decrease the rate of oxidation of carbon at the anode. done clear
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• question_answer27)
  The correct order of increasing \[C-O\] bond length of \[CO,C{{O}_{2}}\] and \[CO_{3}^{2-}\] is:
  A)
  \[CO_{3}^{2-}~<C{{O}_{2}}<CO\]   done clear
  B)
  \[C{{O}_{2}}<CO_{3}^{2-}<CO\] done clear
  C)
  \[CO<CO_{3}^{2-}<C{{O}_{2}}\]      done clear
  D)
  \[CO<C{{O}_{2}}<CO_{3}^{2-}\] done clear
  View Solution play_arrow

• question_answer28)
  In silicon dioxide
  A)
  there are double bonds between silicon and oxygen atoms done clear
  B)
  silicon atom is bonded to two oxygen atoms done clear
  C)
  each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms done clear
  D)
  each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms. done clear
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• question_answer29)
  Example of a three-dimensional silicate is:
  A)
  Zeolites              done clear
  B)
  Ultramarines done clear
  C)
  Feldspars           done clear
  D)
  Beryls done clear
  View Solution play_arrow

• question_answer30)
  Identify the incorrect statement:
  A)
  In \[{{\left( S{{i}_{3}}{{O}_{9}} \right)}^{6-}},\] tetrahedral \[Si{{O}_{4}}\] units share two oxygen atoms. done clear
  B)
  Trialkylchlorosilane on hydrolysis gives \[{{R}_{3}}SiOH.\] done clear
  C)
  \[SiC{{l}_{4}}\] undergoes hydrolysis to give \[{{H}_{4}}Si{{O}_{4}}\] done clear
  D)
  \[{{\left( S{{i}_{3}}{{O}_{9}} \right)}^{6-}}\] has cyclic structure. done clear
  View Solution play_arrow

• question_answer31)
  Aluminium chloride exists as dimer, \[A{{l}_{2}}C{{l}_{6}}\] in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
  A)
  \[{{[Al{{(OH)}_{6}}]}^{3-}}+3HCl\] done clear
  B)
  \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}+3C{{l}^{-}}\] done clear
  C)
  \[A{{l}^{3+}}+3C{{l}^{-}}\] done clear
  D)
  \[A{{l}_{2}}{{O}_{3}}+6HCl\] done clear
  View Solution play_arrow

• question_answer32)
  When Al is added to \[NaOH\] solution
  A)
  No action takes place done clear
  B)
  \[NaAl{{O}_{2}}\] is formed and \[{{H}_{2}}\] is evolved done clear
  C)
  \[Al{{\left( OH \right)}_{3}}\] is formed and \[{{H}_{2}}\] is evolved done clear
  D)
  \[N{{a}_{2}}Al{{O}_{2}}\] is formed and\[{{H}_{2}}\]is evolved done clear
  View Solution play_arrow

• question_answer33)
  Which of the following statement(s) is / are incorrect for\[C{{O}_{2}}\]?

  (i) In laboratory \[C{{O}_{2}}\] is prepared by the action of dilute \[HCl\] on calcium carbonate

  (ii) Carbon dioxide is a poisonous gas

  (iii) Increase in carbon dioxide content in atmosphere lead to increase in green house effect.

  (iv) \[C{{O}_{2}}\] as dry ice is used as a refrigerant for ice cream and frozen food.

  A)
  (i) and (ii)           done clear
  B)
  Only (ii) done clear
  C)
  (i),(ii) and (iii)     done clear
  D)
  (ii) and (iii) done clear
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• question_answer34)
  A group 14 element is oxidised to form corresponding oxide which is gaseous in nature, when dissolved in water pH of the water decreases further addition of group 2 hydroxides leads to precipitation. This oxide can be
  A)
  \[Ge{{O}_{2}}\]                        done clear
  B)
  CO done clear
  C)
  \[C{{O}_{2}}\]                         done clear
  D)
  \[Sn{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer35)
  \[Pb{{F}_{4}},PbC{{l}_{4}}\] exist but \[PbB{{r}_{4}}\] and \[Pb{{I}_{4}}\] do not exist because of
  A)
  large size of \[B{{r}^{-}}\] and \[{{I}^{-}}\] done clear
  B)
  strong oxidising character of \[P{{b}^{4+}}\] done clear
  C)
  strong reducing character of \[P{{b}^{4+}}\] done clear
  D)
  low electronegativity of \[B{{r}^{-}}\] and \[{{I}^{-}}\]. done clear
  View Solution play_arrow

• question_answer36)
  Which one of the following is a correct set for \[Si{{O}_{2}}\]?
  A)
  Linear acidic done clear
  B)
  Linear, basic done clear
  C)
  Tetrahedral, acidic done clear
  D)
  Angular, basic. done clear
  View Solution play_arrow

• question_answer37)
  Which is not the use of orthoboric acid?
  A)
  As an antiseptic and eye wash. done clear
  B)
  In glass industry. done clear
  C)
  In glazes for pottery. done clear
  D)
  In borax - bead test. done clear
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• question_answer38)
  The factor responsible for weak acidic nature of B-F bonds in \[B{{F}_{3}}\] is 
  A)
  large electronegativity of fluorine done clear
  B)
  three centred two electron bonds in \[B{{F}_{3}}\] done clear
  C)
  \[p\pi -d\pi \] back bonding done clear
  D)
  \[p\pi -p\pi \] back bonding done clear
  View Solution play_arrow

• question_answer39)
  Which of the following has the minimum heat of dissociation:
  A)
  \[{{\left( C{{H}_{3}} \right)}_{3}}N:\to B{{F}_{3}}\] done clear
  B)
  \[{{(C{{H}_{3}})}_{3}}N:\to B{{(C{{H}_{3}})}_{2}}F\] done clear
  C)
  \[{{(C{{H}_{3}})}_{3}}N:\to B{{(C{{H}_{3}})}_{3}}\] done clear
  D)
  \[{{\left( C{{H}_{3}} \right)}_{3}}N:\to \text{ }B\left( C{{H}_{3}} \right){{F}_{2}}\] done clear
  View Solution play_arrow

• question_answer40)
  Lead is not affected by dil. \[HCl\] in cold because
  A)
  Pb is less electronegative than H done clear
  B)
  PbO film is formed which resists chemical attack by acid done clear
  C)
  \[PbC{{l}_{2}}\] protective coating gets formed on Pb surface done clear
  D)
  \[Pb{{O}_{2}}\] film is always present on Pb surface, which resist chemical attack done clear
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• question_answer41)
  The catenation tendency of C, Si and Ge is in the order \[Ge<Si<C.\] The bond energies (in\[kJmo{{l}^{-1}}\]) of \[C-C,\] \[Si-Si\] and \[Ge-Ge\] bonds are respectively           
  A)
  348, 297, 260      done clear
  B)
  297, 348, 260 done clear
  C)
  348, 260, 297      done clear
  D)
  260, 297, 348 done clear
  View Solution play_arrow

• question_answer42)
  The melting pt. of group 13 follows the order
  A)
  \[B>Al>Ga>In>Tl\] done clear
  B)
  \[B>Al<Ga>In>Tl\] done clear
  C)
  \[B>Al>Tl>In>Ga\] done clear
  D)
  \[B>Al<Ga<In<Tl\] done clear
  View Solution play_arrow

• question_answer43)
  \[Al{{I}_{3}},\] when reacts with \[CC{{l}_{4}}\] gives
  A)
  \[AlC{{l}_{3}}\]                                    done clear
  B)
  \[C{{I}_{4}}\] done clear
  C)
  \[A{{l}_{4}}{{C}_{3}}\]                       done clear
  D)
  both [a] and [b] done clear
  View Solution play_arrow

• question_answer44)
  Which of the following properties of aluminium makes it useful for food packaging?
  A)
  Good electrical conductivity done clear
  B)
  Good thermal conductivity done clear
  C)
  Low density done clear
  D)
  Non toxicity done clear
  View Solution play_arrow

• question_answer45)
  A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?
  A)
  \[MC{{l}_{2}}\] is more ionic than \[MC{{l}_{4}}\] done clear
  B)
  \[MC{{l}_{2}}\] is more easily hydrolysed than \[MC{{l}_{4}}\] done clear
  C)
  \[MC{{l}_{2}}\] is more volatile than \[MC{{l}_{4}}\] done clear
  D)
  \[MC{{l}_{2}}\] is more soluble in anhydrous ethanol than \[MC{{l}_{4}}\] done clear
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• question_answer46)
  Among the following substituted silanes the one which will give rise to cross linked silicone polymer on hydrolysis is
  A)
  \[{{R}_{4}}Si\]                         done clear
  B)
  \[{{R}_{2}}SiC{{l}_{2}}\] done clear
  C)
  \[RSiC{{l}_{3}}\]                      done clear
  D)
  \[{{R}_{3}}SiCl\] done clear
  View Solution play_arrow

• question_answer47)
  Which of the following statements is false?
  A)
  Water gas is a mixture of hydrogen and carbon monoxide done clear
  B)
  Producer gas is a mixture of CO and nitrogen done clear
  C)
  Water gas is a mixture of water vapour and hydrogen done clear
  D)
  Natural gas consists of methane, ethane and gaseous hydrocarbons. done clear
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• question_answer48)
  Lead pipes are not suitable for drinking water because
  A)
  lead forms basic lead carbonate done clear
  B)
  lead reacts with water containing air to form \[Pb{{(OH)}_{2}}\] done clear
  C)
  a layer of lead dioxide is deposited over pipes done clear
  D)
  lead reacts with air to form litharge done clear
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• question_answer49)
  Choose the correct sequence for the geometry of the given molecules Borazone, Borazole, \[{{B}_{3}}O_{6}^{3-}\] ['P' stands for planar and 'N' stands for non- planar]                
  A)
  NP, NP, NP      done clear
  B)
  P, P, NP done clear
  C)
  NP, P, NP          done clear
  D)
  NP, P, P done clear
  View Solution play_arrow

• question_answer50)
  Which out of the following compounds does not exist?
  A)
  \[B{{F}_{3}}\]                                      done clear
  B)
  \[TIC{{l}_{3}}\] done clear
  C)
  \[TIC{{l}_{5}}\]                        done clear
  D)
  Both [b] and [c] done clear
  View Solution play_arrow

• question_answer51)
  Anhydrous \[AlC{{l}_{3}}\] is prepared from
  A)
  cone. \[HCl\] and Al metal done clear
  B)
  aluminium and \[C{{l}_{\text{2}}}\] done clear
  C)
  dry \[HCl\] gas + heated Al metal done clear
  D)
  dil. \[HCl\] and Al metal done clear
  View Solution play_arrow

• question_answer52)
  Boric acid is polymeric due to
  A)
  its acidic nature done clear
  B)
  the presence of hydrogen bonds done clear
  C)
  its monobasic .nature done clear
  D)
  its geometry done clear
  View Solution play_arrow

• question_answer53)
  \[A{{l}_{2}}{{O}_{3}}\] can be converted to anhydrous \[AlC{{l}_{3}}\] by heating 
  A)
  \[A{{l}_{2}}{{O}_{3}}\] with \[NaCl\] in solid state done clear
  B)
  a mixture of \[A{{l}_{2}}{{O}_{3}}\] and carbon in dry \[C{{l}_{2}}\] gas done clear
  C)
  \[A{{l}_{2}}{{O}_{3}}\] wither gas done clear
  D)
  \[A{{l}_{2}}{{O}_{3}}\] with \[HCl\] gas done clear
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• question_answer54)
  In which of the following, a salt of the type \[KM{{O}_{2}}\] is obtained?
  A)
  \[{{B}_{2}}{{H}_{6}}+KOH\,(aq)\to \] done clear
  B)
  \[Al+KOH\left( aq \right)\to \] done clear
  C)
  Both done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer55)
  Bauxite ore is generally contaminated with impurity of oxides of two elements X and Y. Which of the following statement is correct?
  A)
  X is a non-metal and belongs to the third period while Y is a metal and belongs to the fourth period. done clear
  B)
  One of two oxides has three-dimensional polymeric structure. done clear
  C)
  Both [a] and [b] are correct. done clear
  D)
  None of the above. done clear
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• question_answer56)
  A solid element (symbol Y) conducts electricity and forms two chlorides \[YC{{l}_{n}}\] (colourless volatile liquid) and \[YC{{l}_{n-2}}\] (a colourless solid). To which one of the following groups of the periodic table does Y belong?
  A)
  13                     done clear
  B)
  14    done clear
  C)
  15                                 done clear
  D)
  16 done clear
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• question_answer57)
  The structure and hybridization of \[Si(C{{H}_{3}})\] is
  A)
  Bent, sp             done clear
  B)
  Trigonal, \[s{{p}^{2}}\] done clear
  C)
  Octahedral, \[{{d}^{2}}s{{p}^{3}}\] done clear
  D)
  Tetrahedral, \[s{{p}^{3}}\] done clear
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• question_answer58)
  When steam reacts with red hot coke to form \[C{{O}_{2}}\] and hydrogen:
  A)
  Water acts as an oxidising agent. done clear
  B)
  Water acts as a reducing agent. done clear
  C)
  Carbon acts as an oxidising agent. done clear
  D)
  There is no oxidation or reduction. done clear
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• question_answer59)
  Which of the following is/are not correctly matched?

  (i) \[Ge{{O}_{2}}\] - Acidic

  (ii) \[Pb{{O}_{2}}\] - Amphoteric

  (iii) CO - Neutral

  (iv) \[Si{{O}_{2}}\] - Amphoteric

  A)
  (i) and (iv)          done clear
  B)
  (iv) only done clear
  C)
  (ii) only              done clear
  D)
  (iii) only done clear
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• question_answer60)
  The shape of gaseous \[SnC{{l}_{2}}\] is
  A)
  tetrahedral         done clear
  B)
  linear done clear
  C)
  angular              done clear
  D)
  T-shaped done clear
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