JEE Main & Advanced Chemistry Chemical Bonding and Molecular Structure / रासायनिक आबंधन एवं आणविक संरचना Question Bank

done Polarisation and Fajan's rule Total Questions - 26

• question_answer1)
  \[B{{F}_{3}}\] and \[N{{F}_{3}}\]both molecules are covalent, but \[B{{F}_{3}}\] is non-polar and \[N{{F}_{3}}\] is polar. Its reason is [CPMT 1989; NCERT 1980]
  A)
                  In uncombined state boron is metal and nitrogen is gas done clear
  B)
                  \[B-F\]bond has no dipole moment whereas \[N-F\] bond has dipole moment done clear
  C)
                  The size of boron atom is smaller than nitrogen done clear
  D)
                  \[B{{F}_{3}}\] is planar whereas \[N{{F}_{3}}\] is pyramidal done clear
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• question_answer2)
  Which one is polar molecule among the following
  A)
                  \[C{{O}_{2}}\]    done clear
  B)
                  \[CC{{l}_{4}}\] done clear
  C)
                  \[{{H}_{2}}O\]   done clear
  D)
                  \[C{{H}_{4}}\] done clear
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• question_answer3)
  If the electron pair forming a bond between two atoms A and B is not in the centre, then the bond is     [AIIMS 1984]
  A)
                  Single bond        done clear
  B)
                  Polar bond done clear
  C)
                  Non-polar bond                done clear
  D)
                  \[\pi \]bond done clear
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• question_answer4)
  Which of the following liquids is not deflected by a non-uniform electrostatic field                           [NCERT 1978]
  A)
                  Water   done clear
  B)
                  Chloroform done clear
  C)
                  Nitrobenzene    done clear
  D)
                  Hexane done clear
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• question_answer5)
  Which of the following is non-polar         [EAMCET 1983]
  A)
                  \[{{H}_{2}}S\]    done clear
  B)
                  \[NaCl\] done clear
  C)
                  \[C{{l}_{2}}\]      done clear
  D)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
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• question_answer6)
  Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is correct                                  [NCERT 1982]
  A)
                  Maximum polarization is brought about by a cation of high charge done clear
  B)
                  Minimum polarization is brought about by a cation of low radius done clear
  C)
                  A large cation is likely to bring about a large degree of polarization done clear
  D)
                  A small anion is likely to undergo a large degree of polarization done clear
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• question_answer7)
  The bonds between \[P\] atoms and \[Cl\] atoms in \[PC{{l}_{5}}\] are likely to be                                           [MP PMT 1987]
  A)
                  Ionic with no covalent character done clear
  B)
                  Covalent with some ionic character done clear
  C)
                  Covalent with no ionic character done clear
  D)
                  Ionic with some metallic character done clear
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• question_answer8)
  Two electrons of one atom A and two electrons of another atom B are utilized to form a compound AB. This is an example of                                            [MNR 1981]
  A)
                  Polar covalent bond        done clear
  B)
                  Non-polar covalent bond done clear
  C)
                  Polar bond          done clear
  D)
                  Dative bond done clear
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• question_answer9)
  In which of the following molecule is the covalent bond most polar             [AMU 1985; MP PET 2001]
  A)
                  \[HI\]    done clear
  B)
                  \[HBr\] done clear
  C)
                  \[HCl\]  done clear
  D)
                  \[{{H}_{2}}\] done clear
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• question_answer10)
  Amongst \[Cl{{F}_{3}},\,\,B{{F}_{3}}\] and \[N{{H}_{3}}\] molecules the one with non-planar geometry is             [MP PMT 1999]
  A)
                  \[Cl{{F}_{3}}\]    done clear
  B)
                  \[N{{H}_{3}}\] done clear
  C)
                  \[B{{F}_{3}}\]     done clear
  D)
                  None of these done clear
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• question_answer11)
  Which of the following possesses highest melting point [CPMT 1999]
  A)
                  Chlorobenzene done clear
  B)
                  o-dichlorobenzene done clear
  C)
                  m-dichlorobenzene        done clear
  D)
                  p-dichlorobenzene done clear
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• question_answer12)
  The polar molecule among the following is [Orissa JEE 1997]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[C{{O}_{2}}\] done clear
  C)
                  \[C{{H}_{2}}C{{l}_{2}}\] done clear
  D)
                  \[C{{H}_{2}}=C{{H}_{2}}\] done clear
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• question_answer13)
  Which of the following have both polar and non-polar bonds                                      [AIIMS 1997]
  A)
                  \[{{C}_{2}}{{H}_{6}}\]     done clear
  B)
                  \[N{{H}_{4}}Cl\] done clear
  C)
                  \[HCl\]  done clear
  D)
                  \[AlC{{l}_{3}}\] done clear
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• question_answer14)
  Which of the following has a high polarising power [CET Pune 1998]
  A)
                  \[M{{g}^{2+}}\]                done clear
  B)
                  \[A{{l}^{3+}}\] done clear
  C)
                  \[N{{a}^{+}}\]    done clear
  D)
                  \[C{{a}^{2+}}\] done clear
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• question_answer15)
  Maximum covalent character is associated with the compound [RPMT 1999]
  A)
                  \[NaI\]  done clear
  B)
                  \[Mg{{I}_{2}}\] done clear
  C)
                  \[AlC{{l}_{3}}\]  done clear
  D)
                  \[Al{{I}_{3}}\] done clear
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• question_answer16)
  Polarisibility of halide ions increases in the order [DCE 1999]
  A)
                  \[{{F}^{-}},\,\,{{I}^{-}},\,\,B{{r}^{-}},\,\,C{{l}^{-}}\]            done clear
  B)
                  \[C{{l}^{-}},\,\,B{{r}^{-}},\,\,\,{{I}^{-}},\,\,\,{{F}^{-}}\] done clear
  C)
                  \[{{I}^{-}},\,\,B{{r}^{-}},\,\,C{{l}^{-}},\,\,{{F}^{-}}\]            done clear
  D)
                  \[{{F}^{-}},\,\,C{{l}^{-}},\,\,B{{r}^{-}},\,\,{{I}^{-}}\] done clear
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• question_answer17)
  According to Fajan?s rule, covalent bond is favoured by                                                 [AIIMS 1999]
  A)
                  Large cation and small anion done clear
  B)
                  Large cation and large anion done clear
  C)
                  Small cation and large anion done clear
  D)
                  Small cation and small anion done clear
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• question_answer18)
  Which of the following statements is correct       [AMU 1999]
  A)
                  \[S{{F}_{4}}\]is polar and non-reactive done clear
  B)
                  \[S{{F}_{6}}\]is non-polar and very reactive done clear
  C)
                  \[S{{F}_{6}}\]is a strong fluorinating agent done clear
  D)
                  \[S{{F}_{4}}\]is prepared by fluorinating \[SC{{l}_{2}}\]with \[NaF\] done clear
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• question_answer19)
  Choose the correct statement   [RPMT 2000]
  A)
                  Amino polarisation is more pronounced by highly charged cation done clear
  B)
                  Small cation has minimum capacity to polarise an anion. done clear
  C)
                  Small anion has maximum polarizability done clear
  D)
                  None of these done clear
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• question_answer20)
  The \[ICl\] molecule is   [DPMT 2001]
  A)
                  Purely electrovalent done clear
  B)
                  Purely covalent done clear
  C)
                  Polar with negative end on iodine done clear
  D)
                  Polar with negative end on chlorine done clear
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• question_answer21)
  Which of the following is a polar compound         [AIIMS 2001]
  A)
                  HF           done clear
  B)
                  HCl done clear
  C)
                  \[HN{{O}_{3}}\]                done clear
  D)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
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• question_answer22)
  Which of the following has zero dipole moment [MP PMT 2002]
  A)
                  ClF          done clear
  B)
   \[PC{{l}_{3}}\] done clear
  C)
                  \[Si{{F}_{4}}\]      done clear
  D)
                  \[CFC{{l}_{3}}\] done clear
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• question_answer23)
  Which of the following compounds has least dipole moment [RPET 2003]
  A)
                  \[P{{H}_{3}}\]    done clear
  B)
                  \[CHC{{l}_{3}}\] done clear
  C)
                  \[N{{H}_{3}}\]   done clear
  D)
                  \[B{{F}_{3}}\] done clear
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• question_answer24)
  Pauling?s electronegativity values for elements are useful in predicting                                                  [UPSEAT 2004]
  A)
                  Polarity of bonds in molecules done clear
  B)
                  Position of elements in electrochemical series done clear
  C)
                  Co-ordination number done clear
  D)
                  Dipole moment of various molecules done clear
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• question_answer25)
  Amongst LiCl, RbCl, \[BeC{{l}_{2}}\] and \[MgC{{l}_{2}}\] the compounds with the greatest and the least ionic character, respectively, are              [UPSEAT 2002]
  A)
                  LiCl and RbCl       done clear
  B)
                  RbCl and \[BeC{{l}_{2}}\] done clear
  C)
                  RbCl and \[MgC{{l}_{2}}\]             done clear
  D)
                  \[MgC{{l}_{2}}\] and \[BeC{{l}_{2}}\] done clear
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• question_answer26)
  Bond polarity of diatomic molecule is because of [UPSEAT 2002]
  A)
                  Difference in electron affinities of the two atoms done clear
  B)
                  Difference in electronegativities of the two atoms done clear
  C)
                  Difference in ionisation potential done clear
  D)
                  All of these done clear
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