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

done Dipole moment Total Questions - 35

• question_answer1)
  Which molecules has zero dipole moment                           [AIIMS 1980, 82, 91; Roorkee 2000; MH CET 2001]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  \[C{{O}_{2}}\] done clear
  C)
                  \[HF\]   done clear
  D)
                  \[HBr\] done clear
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• question_answer2)
  In the following which one have zero dipole moment [DPMT 1985]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[CC{{l}_{4}}\] done clear
  C)
                  \[BeC{{l}_{2}}\] done clear
  D)
                  All of these done clear
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• question_answer3)
  Which molecule has the largest dipole moment [CPMT 1991]
  A)
                  \[HCl\]  done clear
  B)
                  \[HI\] done clear
  C)
                  \[HBr\] done clear
  D)
                  \[HF\] done clear
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• question_answer4)
  The unequal sharing of bonded pair of electrons between two atoms in a molecule causes          [EAMCET 1986]
  A)
                  Dipole   done clear
  B)
                  Radical formation done clear
  C)
                  Covalent bond done clear
  D)
                  Decomposition of molecule done clear
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• question_answer5)
  Which of the following will show least dipole character  [NCERT 1975; Kurukshetra CEE 1998]
  A)
                  Water   done clear
  B)
                  Ethanol done clear
  C)
                  Ethane  done clear
  D)
                  Ether done clear
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• question_answer6)
  Which of the following molecules will show dipole moment         [NCERT 1972, 74; DPMT 1985]
  A)
                  Methane             done clear
  B)
                  Carbon tetrachloride done clear
  C)
                  Chloroform         done clear
  D)
                  Carbon dioxide done clear
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• question_answer7)
  Which of the following compounds possesses the dipole moment           [NCERT 1978; EAMCET 1983; MP PMT 1995]
  A)
                  Water   done clear
  B)
                  Boron trifluoride done clear
  C)
                  Benzene              done clear
  D)
                  Carbon tetrachloride      done clear
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• question_answer8)
  Which bond angle \[\theta \]would result in the maximum dipole moment for the triatomic molecule \[YXY\] [AIIMS 1980]
  A)
                  \[\theta ={{90}^{o}}\]    done clear
  B)
                  \[\theta ={{120}^{o}}\] done clear
  C)
                  \[\theta ={{150}^{o}}\]  done clear
  D)
                  \[\theta ={{180}^{o}}\] done clear
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• question_answer9)
  Which of the following would have a permanent dipole moment              [CBSE PMT 2005]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[Si{{F}_{4}}\] done clear
  C)
                  \[S{{F}_{4}}\]     done clear
  D)
                  \[Xe{{F}_{4}}\] done clear
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• question_answer10)
  Carbon tetrachloride has no net dipole moment because of                                                                 [IIT 1982, 83; MP PMT 1985, 91; EAMCET 1988; AMU 1999]
  A)
                  Its planar structure done clear
  B)
                  Its regular tetrahedral structure done clear
  C)
                  Similar sizes of carbon and chlorine atoms done clear
  D)
                  Similar electron affinities of carbon and chlorine done clear
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• question_answer11)
  The molecule which has the largest dipole moment amongst the following          [MNR 1983]
  A)
                  \[C{{H}_{4}}\]    done clear
  B)
                  \[CHC{{l}_{3}}\] done clear
  C)
                  \[CC{{l}_{4}}\]   done clear
  D)
                  \[CH{{I}_{3}}\] done clear
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• question_answer12)
  Positive dipole moment is present in [MNR 1986; MP PET 2000]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[{{C}_{6}}{{H}_{6}}\] done clear
  C)
                  \[B{{F}_{3}}\]     done clear
  D)
                  \[HF\] done clear
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• question_answer13)
  The polarity of a covalent bond between two atoms depends upon                                        [AMU 1982]
  A)
                  Atomic size done clear
  B)
                  Electronegativity done clear
  C)
                  Ionic size              done clear
  D)
                  None of the above done clear
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• question_answer14)
  Pick out the molecule which has zero dipole moment     [CPMT 1989; EAMCET 1993; MP PMT 1999]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[{{H}_{2}}O\] done clear
  C)
                  \[BC{{l}_{3}}\]   done clear
  D)
                  \[S{{O}_{2}}\] done clear
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• question_answer15)
  Zero dipole moment is present in             [DPMT 1986; IIT 1987]
  A)
                  \[N{{H}_{3}}\]   done clear
  B)
                  \[{{H}_{2}}O\] done clear
  C)
                  cis 1, 2-dichloroethene  done clear
  D)
                  trans 1, 2-dichloroethene done clear
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• question_answer16)
  Which of the following is the most polar                [AFMC 1988]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[CHC{{l}_{3}}\] done clear
  C)
                  \[C{{H}_{3}}OH\]             done clear
  D)
                  \[C{{H}_{3}}Cl\] done clear
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• question_answer17)
  Which one has minimum (nearly zero) dipole moment   [IIT Screening 1994; CBSE PMT 1996]
  A)
                  Butene-1             done clear
  B)
                  cis butene-2 done clear
  C)
                  trans butene-2 done clear
  D)
                  2-methyl-1-propene done clear
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• question_answer18)
  Which one of the following is having zero dipole moment             [RPMT 1997; EAMCET 1988; MNR 1991]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[C{{H}_{3}}Cl\] done clear
  C)
                  \[C{{H}_{3}}F\]  done clear
  D)
                  \[CHC{{l}_{3}}\] done clear
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• question_answer19)
  Which of the following molecules does not possess a permanent dipole moment             [CBSE PMT 1994]
  A)
                  \[{{H}_{2}}S\]    done clear
  B)
                  \[S{{O}_{2}}\] done clear
  C)
                  \[C{{S}_{2}}\]     done clear
  D)
                  \[S{{O}_{3}}\] done clear
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• question_answer20)
  Which of the following has zero dipole moment [CPMT 1997; AFMC 1998; CBSE PMT 2001]
  A)
                  \[C{{H}_{2}}C{{l}_{2}}\] done clear
  B)
                  \[C{{H}_{4}}\] done clear
  C)
                  \[N{{H}_{3}}\]   done clear
  D)
                  \[P{{H}_{3}}\] done clear
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• question_answer21)
  Fluorine is more electronegative than either boron or phosphorus. What conclusion can be drawn from the fact that \[B{{F}_{3}}\] has no dipole moment but \[P{{F}_{3}}\] does [Pb. PMT 1998]
  A)
                  \[B{{F}_{3}}\]is not spherically symmetrical but \[P{{F}_{3}}\] is done clear
  B)
                  \[B{{F}_{3}}\]molecule must be linear done clear
  C)
                  The atomic radius of \[P\] is larger than the atomic radius of \[B\] done clear
  D)
                  The \[B{{F}_{3}}\] molecule must be planar triangular done clear
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• question_answer22)
  Which molecule does not show zero dipole moment [RPET 1997, 99]
  A)
                  \[B{{F}_{3}}\]     done clear
  B)
                  \[N{{H}_{3}}\] done clear
  C)
                  \[CC{{l}_{4}}\]   done clear
  D)
                  \[C{{H}_{4}}\] done clear
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• question_answer23)
  The dipole moment of HBr is \[1.6\times {{10}^{-30}}\]cm and interatomic spacing is 1Å. The % ionic character of HBr is [MP PMT 2000]
  A)
                  7              done clear
  B)
                  10 done clear
  C)
                  15           done clear
  D)
                  27 done clear
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• question_answer24)
  Non-polar solvent is       [RPET 2000]
  A)
                  Dimethyl sulphoxide      done clear
  B)
                  Carbon tetrachloride      done clear
  C)
                  Ammonia            done clear
  D)
                  Ethyl alcohol done clear
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• question_answer25)
  Which shows the least dipole moment  [UPSEAT 2001; DPMT 1982]
  A)
                  \[CC{{l}_{4}}\]   done clear
  B)
                  \[CHC{{l}_{3}}\] done clear
  C)
                  \[C{{H}_{3}}C{{H}_{2}}OH\]         done clear
  D)
                  \[C{{H}_{3}}COC{{H}_{3}}\] done clear
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• question_answer26)
  Which molecule has zero dipole moment             [UPSEAT 2001]
  A)
                  \[{{H}_{2}}O\]   done clear
  B)
                  AgI done clear
  C)
                  \[PbS{{O}_{4}}\]               done clear
  D)
                  HBr done clear
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• question_answer27)
  The dipole moment is zero for the molecule [IIT 1989; MP PMT 2002]
  A)
                  Ammonia            done clear
  B)
                          Boron trifluoride done clear
  C)
                  Sulphur dioxide                done clear
  D)
                  Water done clear
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• question_answer28)
  \[{{N}_{2}}\] is less reactive than \[C{{N}^{-}}\]due to              [UPSEAT 2003]
  A)
                  Presence of more electrons in orbitals done clear
  B)
                  Absence of dipole moment done clear
  C)
                  Difference in spin quantum no done clear
  D)
                  None of these done clear
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• question_answer29)
  In a polar molecule, the ionic charge is \[4.8\times {{10}^{-10}}\] e.s.u. If the inter ionic distance is one Å unit, then the dipole moment is                                             [MH CET 2003]
  A)
                  41.8 debye          done clear
  B)
                          4.18 debye done clear
  C)
                  4.8 debye            done clear
  D)
                  0.48 debye done clear
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• question_answer30)
  Which of the following is a polar compound [Pb. CET 2000]
  A)
                  \[HCl\]  done clear
  B)
                          \[{{H}_{2}}Se\] done clear
  C)
                  \[C{{H}_{4}}\]    done clear
  D)
                  \[HI\] done clear
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• question_answer31)
  Which of the following has no dipole moment [DCE 2002]
  A)
                  \[C{{O}_{2}}\]    done clear
  B)
                          \[S{{O}_{3}}\] done clear
  C)
                  \[{{O}_{3}}\]      done clear
  D)
                  \[{{H}_{2}}O\] done clear
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• question_answer32)
  Which of the following is non-polar         [DCE 2002]
  A)
                  \[PC{{l}_{5}}\]   done clear
  B)
                  \[PC{{l}_{3}}\] done clear
  C)
                  \[S{{F}_{6}}\]     done clear
  D)
                  \[I{{F}_{7}}\] done clear
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• question_answer33)
  Identify the non-polar molecule in the set of compounds given : \[HCl,\,HF,\,{{H}_{2}},\,HBr\] [UPSEAT 2004]
  A)
                  \[{{H}_{2}}\]       done clear
  B)
                  \[HCl\] done clear
  C)
                  \[HF,\,HBr\]       done clear
  D)
                  \[HBr\] done clear
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• question_answer34)
  Dipole moment is shown by        [IIT 1986]
  A)
                  1, 4-dichlorobenzene     done clear
  B)
                  \[cis\] 1, 2-dichloroethene done clear
  C)
                  \[trans\]1, 2-dichloroethene done clear
  D)
                  \[trans\]1, 2-dichloro-2-pentene done clear
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• question_answer35)
  If HCl molecule is completely polarized, so expected value of dipole moment is 6.12D (deby), but experimental value of dipole moment is 1.03D. Calculate the percentage ionic character             [Kerala CET 2005]
  A)
                  17           done clear
  B)
                  83 done clear
  C)
                  50           done clear
  D)
                  Zero done clear
  E)
                  90 done clear
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