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

done Critical Thinking Total Questions - 29

• question_answer1)
  The values of electronegativity of atoms A and B are 1.20 and 4.0 respectively. The percentage of ionic character of    A ? B bond is                                                 [MP PET 2003]
  A)
                  50 %       done clear
  B)
                  43 % done clear
  C)
                  55.3 %   done clear
  D)
                  72.24% done clear
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• question_answer2)
  \[O_{2}^{2-}\]is the symbol of ?.. ion     [EAMCET 2003]
  A)
                  Oxide    done clear
  B)
                          Superoxide done clear
  C)
                  Peroxide              done clear
  D)
                  Monoxide done clear
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• question_answer3)
  The number of electrons that are paired in oxygen molecule is                                  [IIT 1995]
  A)
                  7              done clear
  B)
                  8 done clear
  C)
                  14           done clear
  D)
                  16 done clear
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• question_answer4)
  When \[{{N}_{2}}\] goes to \[N_{2}^{+},\] the \[N-N\] bond distance ..... and when \[{{O}_{2}}\] goes to \[O_{2}^{+},\] the \[O-O\] bond distance ....... [IIT 1996]
  A)
                  Decrease, increase          done clear
  B)
                   Increase, decrease done clear
  C)
                  Increase, increase           done clear
  D)
                  None of these done clear
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• question_answer5)
  Which of the following contains a coordinate covalent bond [UPSEAT 2001]
  A)
                  \[{{N}_{2}}H_{5}^{+}\]  done clear
  B)
                  \[BaC{{l}_{2}}\] done clear
  C)
                  HCl         done clear
  D)
                  \[{{H}_{2}}O\] done clear
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• question_answer6)
  Which combination is best explained by the co-ordinate covalent bond [JIPMER 2001; CBSE PMT 1990]
  A)
                  \[{{H}^{+}}+{{H}_{2}}O\]              done clear
  B)
                  Cl + Cl done clear
  C)
                  \[Mg+\frac{1}{2}{{O}_{2}}\]        done clear
  D)
                  \[{{H}_{2}}+{{I}_{2}}\] done clear
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• question_answer7)
  Arrange the following compounds in order of increasing dipole moment. (I)           Toluene                                               (II)          \[m-\]dichlorobenzene (III)         \[o-\]dichlorobenzene                  (IV)        \[p-\]dichlorobenzene [IIT 1996]
  A)
                  \[I<IV<II<III\]    done clear
  B)
                  \[IV<I<II<III\] done clear
  C)
                  \[IV<I<III<II\]    done clear
  D)
                  \[IV<II<I<III\] done clear
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• question_answer8)
  The correct order of dipole moment is   [Roorkee 1999]
  A)
                  \[C{{H}_{4}}<N{{F}_{3}}<N{{H}_{3}}<{{H}_{2}}O\] done clear
  B)
                  \[N{{F}_{3}}<C{{H}_{4}}<N{{H}_{3}}<{{H}_{2}}O\] done clear
  C)
                  \[N{{H}_{3}}<N{{F}_{3}}<C{{H}_{4}}<{{H}_{2}}O\] done clear
  D)
                  \[{{H}_{2}}O<N{{H}_{3}}<N{{F}_{3}}<C{{H}_{4}}\] done clear
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• question_answer9)
  Which of the following has the highest dipole moment [AIIMS 2002]
  A)
                  done clear
  B)
    \[\underset{\,C{{H}_{3}}}{\overset{H\,\,\,\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,}{\overset{|\,\,\,\,\,\,\,}{\mathop{C\,\,\,\,}}}\,}}}\,=\,\,\ \underset{H\,\,\,\,\,}{\mathop{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,\,\,\,\,\,}}\,}}\,\] done clear
  C)
                  \[\underset{C{{H}_{3}}\,H}{\overset{C{{H}_{3}}\,H}{\mathop{\underset{|\ \ \ \ \ \,\ \ |}{\overset{|\ \ \ \ \ \ \ \ |}{\mathop{C=C}}}\,}}}\,\]          done clear
  D)
                  \[\underset{C{{H}_{3}}\,}{\overset{Cl\,\,\,\,\,}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,\,\,\,\,\,\,}}}\,=\ \ \underset{Cl\,\,\,}{\overset{\,\,C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,\,\,\,\,\,}}}\,\] done clear
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• question_answer10)
  Which of the following arrangement of molecules is correct on the basis of their dipole moments  [AIIMS 2002]
  A)
                  \[B{{F}_{3}}>N{{F}_{3}}>N{{H}_{3}}\]     done clear
  B)
                  \[N{{F}_{3}}>B{{F}_{3}}>N{{H}_{3}}\] done clear
  C)
                  \[N{{H}_{3}}>B{{F}_{3}}>N{{F}_{3}}\]     done clear
  D)
                  \[N{{H}_{3}}>N{{F}_{3}}>B{{F}_{3}}\] done clear
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• question_answer11)
  The type of hybrid orbitals used by the chlorine atom in \[ClO_{2}^{-}\] is                                             [IIT 1992]
  A)
                  \[s{{p}^{3}}\]     done clear
  B)
                  \[s{{p}^{2}}\] done clear
  C)
                  \[sp\]       done clear
  D)
                  None of these done clear
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• question_answer12)
  Among the following species, identify the isostructural pairs, \[N{{F}_{3}},\,\,NO_{3}^{-},\,\,B{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}},\,\,H{{N}_{3}}\]     [IIT 1996]
  A)
                  \[[N{{F}_{3}},\,\,NO_{3}^{-}]\] and \[[B{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}}]\] done clear
  B)
                  \[[N{{F}_{3}},\,\,H{{N}_{3}}]\] and \[[NO_{3}^{-},\,\,B{{F}_{3}}]\] done clear
  C)
                  \[[N{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}}]\] and \[[NO_{3}^{-},\,\,B{{F}_{3}}]\] done clear
  D)
                  \[[N{{F}_{3}},\,\,{{H}_{3}}{{O}^{+}}]\] and \[[H{{N}_{3}},\,\,B{{F}_{3}}]\] done clear
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• question_answer13)
  In the compound \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-C\equiv CH,\] the \[{{C}_{2}}-{{C}_{3}}\] bond is of the type     [IIT 1999]
  A)
                  \[sp-s{{p}^{2}}\]               done clear
  B)
                  \[s{{p}^{3}}-s{{p}^{3}}\] done clear
  C)
                  \[sp-s{{p}^{3}}\]               done clear
  D)
                  \[s{{p}^{2}}-s{{p}^{3}}\] done clear
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• question_answer14)
  The correct order of increasing \[C-O\] bond length of \[CO,\,\,CO_{3}^{2-},\,\,C{{O}_{2}}\] is                                   [IIT 1999]
  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
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• question_answer15)
  In the dichromate dianion            [IIT 1999]
  A)
                  \[4\,Cr-O\]bonds are equivalent done clear
  B)
                  \[6\,Cr-O\]bonds are equivalent done clear
  C)
                  All \[Cr-O\] bonds are equivalent done clear
  D)
                  All \[Cr-O\] bonds are non-equivalent done clear
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• question_answer16)
  Bond length of ethane (I), ethene (II), acetylene (III) and benzene (IV) follows the order             [CPMT 1999]
  A)
                  \[I>II>III>IV\]    done clear
  B)
                  \[I>II>IV>III\] done clear
  C)
                  \[I>IV>II>III\]    done clear
  D)
                  \[III>IV>II>I\] done clear
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• question_answer17)
  Hybridisation state of chlorine in \[Cl{{F}_{3}}\] is             [RPET 1999]
  A)
                  \[s{{p}^{3}}\]     done clear
  B)
                  \[s{{p}^{3}}d\] done clear
  C)
                  \[s{{p}^{3}}{{d}^{2}}\]   done clear
  D)
                  \[s{{p}^{3}}{{d}^{3}}\] done clear
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• question_answer18)
  Molecular shapes of \[S{{F}_{4}},\,C{{F}_{4}}\] and \[Xe{{F}_{4}}\]are [IIT Screening 2000]
  A)
                  The same with 2, 0 and 1 lone pairs of electrons respectively done clear
  B)
                  The same, with 1, 1 and 1 lone pairs of electrons respectively done clear
  C)
                  Different, with 0, 1 and 2 lone pairs of electrons respectively done clear
  D)
                  Different, with 1, 0 and 2 lone pairs of electrons respectively done clear
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• question_answer19)
  Structure of \[IF_{4}^{+}\] and hybridization of iodine in this structure are           [UPSEAT 2001]
  A)
                  \[s{{p}^{3}}d\], Linear    done clear
  B)
                  \[s{{p}^{3}}{{d}^{2}}\], T-shaped done clear
  C)
                  \[s{{p}^{3}}d\], Irregular tetrahedral       done clear
  D)
                  \[s{{p}^{3}}{{d}^{2}}\], Octahedral done clear
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• question_answer20)
  In which of the following the central atom does not use sp3 hybrid orbitals in its bonding               [UPSEAT 2001, 02]
  A)
                  \[BeF_{3}^{-}\] done clear
  B)
   \[OH_{3}^{+}\] done clear
  C)
                  \[NH_{2}^{-}\]  done clear
  D)
                  \[N{{F}_{3}}\] done clear
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• question_answer21)
  The magnetic moment of \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] is found to be 1.7 B.M. How many unpaired electron (s) is/are present per molecule                                    [Orissa JEE 2003]
  A)
                  1              done clear
  B)
                  2 done clear
  C)
                  3              done clear
  D)
                  4 done clear
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• question_answer22)
  \[{{N}_{2}}\] and \[{{O}_{2}}\] are converted into monocations \[N_{2}^{+}\] and \[O_{2}^{+}\] respectively. Which is wrong   [CBSE PMT 1997]
  A)
                  In  \[{{N}_{2}},\] the \[N-N\]bond weakens done clear
  B)
                  In \[{{O}_{2}},\] the \[O-O\] bond order increases done clear
  C)
                  In \[{{O}_{2}},\] paramagnetism decreases done clear
  D)
                  \[N_{2}^{+}\] becomes diamagnetic done clear
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• question_answer23)
  The common features among the species \[C{{N}^{-}}\], CO  and \[N{{O}^{+}}\] are                        [IIT Screening 2001]
  A)
                  Bond order three and isoelectronic done clear
  B)
                  Bond order three and weak field ligands done clear
  C)
                  Bond order two and p-acceptors done clear
  D)
                  Isoelectronic and weak field ligands done clear
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• question_answer24)
  The number of \[SS\] bonds in sulphur trioxide trimer \[{{S}_{3}}O{}_{9}\] is                       [IIT Screening 2001]
  A)
                  Three    done clear
  B)
                  Two done clear
  C)
                  One       done clear
  D)
                  Zero done clear
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• question_answer25)
  Strongest intermolecular hydrogen bond is present in the following molecules pairs        [IIT 1981; DCE 2000]
  A)
                  \[Si{{H}_{4}}\] and \[SiF\] done clear
  B)
                  \[C{{H}_{3}}-\overset{\overset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\] and \[CHC{{l}_{3}}\] done clear
  C)
                  \[H-\overset{\overset{O}{\mathop{||}}\,}{\mathop{C}}\,-OH\] and \[C{{H}_{3}}-\overset{\overset{O}{\mathop{||}}\,}{\mathop{C}}\,-OH\] done clear
  D)
                  \[{{H}_{2}}O\] and \[{{H}_{2}}{{O}_{2}}\] done clear
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• question_answer26)
  A compound contains atoms \[X,\,\,Y,\,\,Z.\] The oxidation number of \[X\]is \[sp-s{{p}^{2}}\] is + 5 and \[Z\] is \[-\,2\]. Therefore, a possible formula of the compound is            [CPMT 1988]
  A)
                  \[XY{{Z}_{2}}\]  done clear
  B)
                  \[{{X}_{2}}\,{{\left( Y{{Z}_{3}} \right)}_{2}}\] done clear
  C)
                  \[{{X}_{3}}\,{{\left( Y{{Z}_{4}} \right)}_{2}}\]       done clear
  D)
                  \[{{X}_{3}}\,{{\left( {{Y}_{4}}Z \right)}_{2}}\] done clear
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• question_answer27)
  Bonds present in \[CuS{{O}_{4}}.5{{H}_{2}}O\]is                               [IIT 1983; DCE 2001]
  A)
                  Electrovalent and covalent done clear
  B)
                  Electrovalent and coordinate done clear
  C)
                  Electrovalent, covalent and coordinate done clear
  D)
                  Covalent and coordinate done clear
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• question_answer28)
  The ionization of hydrogen atom would give rise to [UPSEAT 2001]
  A)
   Hybrid ion          done clear
  B)
   Hydronium ion done clear
  C)
                  Proton  done clear
  D)
   Hydroxyl ion done clear
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• question_answer29)
  Which can be described as a molecule with residual bonding capacity                                      [JIPMER 2000]
  A)
                  \[BeC{{l}_{2}}\]                done clear
  B)
                  \[NaCl\] done clear
  C)
                  \[C{{H}_{4}}\]    done clear
  D)
                  \[{{N}_{2}}\] done clear
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