JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank

done Conductor and Conductance Total Questions - 27

• question_answer1)
  Which one of the following statements is correct [MP PET 1997]
  A)
                  The oxidation number of oxygen in \[K{{O}_{2}}\] is zero done clear
  B)
                  The specific conductance of an electrolyte solution decreases with increase in dilution done clear
  C)
                  \[S{{n}^{2+}}\] oxidises \[F{{e}^{3+}}\] done clear
  D)
                  \[Zn/ZnS{{O}_{4}}\] is a reference electrode done clear
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• question_answer2)
  In infinite dilutions, the equivalent conductances of \[B{{a}^{2+}}\] and \[C{{l}^{-}}\] are 127 and 76 \[oh{{m}^{-1}}c{{m}^{-1}}\] \[eqv{{t}^{-1}}\]. The equivalent conductivity of \[BaC{{l}_{2}}\]at indefinite dilution is [CBSE 2000]
  A)
                  101.5     done clear
  B)
                  139.5 done clear
  C)
                  203.5     done clear
  D)
                  279.5 done clear
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• question_answer3)
  The factor which is not affecting the conductivity of any solution is
  A)
                  Dilution done clear
  B)
                  Nature of electrolyte done clear
  C)
                  Temperature     done clear
  D)
                  None of these done clear
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• question_answer4)
  Specific conductance of 0.1 m nitric acid is \[6.3\times {{10}^{-2}}\,oh{{m}^{-1}}c{{m}^{-1}}\]. The molar conductance of solution is [Kerala (Med.) 2003]
  A)
                  630 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\]       done clear
  B)
                  315 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done clear
  C)
                  100 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\]       done clear
  D)
                  6300 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done clear
  E)
                  63.0 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done clear
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• question_answer5)
  The conductivity of strong electrolyte is [CPMT 2003]
  A)
                  Increase on dilution slightly done clear
  B)
                  Decrease on dilution done clear
  C)
                  Does not change with dilution done clear
  D)
                  Depend upon density of electrolytes itself done clear
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• question_answer6)
  If X is the specific resistance of the solution and M is the molarity of the solution, the molar conductivity of the solution is given by           [Kurukshetra CEE 2002]
  A)
                  \[\frac{1000X}{M}\]        done clear
  B)
                  \[\frac{1000}{MX}\] done clear
  C)
                  \[\frac{1000M}{X}\]        done clear
  D)
                  \[\frac{MX}{1000}\] done clear
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• question_answer7)
  Conductivity (unit Siemen?s) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is            [AIEEE 2002]
  A)
                  \[Sm\,\,mo{{l}^{-1}}\]   done clear
  B)
                  \[S{{m}^{2}}\,\,mo{{l}^{-1}}\] done clear
  C)
                  \[{{S}^{-2}}{{m}^{2}}\,\,mo{{l}^{{}}}\]    done clear
  D)
                  \[{{S}^{2}}{{m}^{2}}\,\,mo{{l}^{-2}}\] done clear
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• question_answer8)
  If one end of a piece of a metal is heated, the other end becomes hot after some time. This is due to [CBSE PMT 1995]
  A)
                  Energised electrons moving to the other part of the metal done clear
  B)
                  Resistance of the metal done clear
  C)
                  Mobility of atoms in the metal done clear
  D)
                  Minor perturbation in the energy of atoms done clear
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• question_answer9)
  Conductivity of a solution is directly proportional to [KCET 1984]
  A)
                  Dilution done clear
  B)
                  Number of ions done clear
  C)
                  Current density done clear
  D)
                  Volume of the solution done clear
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• question_answer10)
  The increase in equivalent conductance of an electrolyte solution with dilution is due to the increase in [MP PMT 1996]
  A)
                  Ionic attraction done clear
  B)
                  Molecular attraction done clear
  C)
                  Degree of association of the electrolyte done clear
  D)
                  Degree of ionisation of the electrolyte done clear
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• question_answer11)
  Which of the following conducts electricity          [AFMC 1995]
  A)
                  Fused \[NaCl\] done clear
  B)
                  \[C{{O}_{2}}\] done clear
  C)
                  \[B{{r}_{2}}\]     done clear
  D)
                  \[Si\] done clear
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• question_answer12)
  Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]
  A)
                  Potassium           done clear
  B)
                  Graphite done clear
  C)
                  Diamond              done clear
  D)
                  Sodium done clear
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• question_answer13)
  The unit of equivalent conductivity is [CPMT 1999; BCECE 2005]
  A)
                  ohm cm done clear
  B)
                  \[oh{{m}^{-1}}c{{m}^{2}}\,{{(gm\,\ equivalent)}^{-1}}\] done clear
  C)
                  ohm \[c{{m}^{2}}\,(gm\,\,equivalent)\] done clear
  D)
                  \[S\,c{{m}^{-2}}\] done clear
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• question_answer14)
  It has been observed that gaseous hydrogen chloride is  a very poor conductor of electricity but a solution of hydrogen chloride gas in water is a good conductor of electricity. This is due to the fact that             [NCERT 1976]
  A)
                  Water is good conductor of electricity done clear
  B)
                  Hydrogen chloride gas in water solution ionizes done clear
  C)
                  A gas is non-conductor but a liquid conducts electricity done clear
  D)
                  Gas does not obey Ohm's law whereas solution does done clear
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• question_answer15)
  Electrolytic conduction differs from metallic conduction in that in the case of electrolytic conduction [KCET 1987; Bihar CEE 1992]
  A)
                  The resistance increases with increasing temperature done clear
  B)
                  The resistance decreases with increasing temperature done clear
  C)
                  The flow of current does not generate heat done clear
  D)
                  The resistance is independent of the length of the conductor done clear
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• question_answer16)
  The electrolytic conductance is a direct measure of [KCET 1990; CPMT 2003]
  A)
                  Resistance          done clear
  B)
                  Potential done clear
  C)
                  Concentration   done clear
  D)
                  Dissociation done clear
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• question_answer17)
  Conductivity of a strong electrolyte         [KCET 1993]
  A)
                  Increases on dilution done clear
  B)
                  Does not change considerably on dilution done clear
  C)
                  Decreases on dilution done clear
  D)
                  Depends on density done clear
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• question_answer18)
  Which of the following statements is not applicable to electrolytic conductors    [AIIMS 1991]
  A)
                  New products show up at the electrodes done clear
  B)
                  Ions are responsible for carrying the current done clear
  C)
                  Show a positive temperature coefficient for conductance done clear
  D)
                  A single stream of electrons flows from cathode to anode done clear
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• question_answer19)
  Which one is not a conductor of electricity           [RPET 1999]
  A)
                  \[NaCl\](aqueous) done clear
  B)
                  \[NaCl\] (solid) done clear
  C)
                  \[NaCl\] (molten)            done clear
  D)
                  \[Ag\] metal done clear
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• question_answer20)
  Solid sodium chloride is bad conductor of electricity because
  A)
                  It contains only molecules done clear
  B)
                  It does not possess ions done clear
  C)
                  The ions present in it are not free to move done clear
  D)
                  It does not contain free molecules done clear
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• question_answer21)
  Which of the following is a poor conductor of electricity [EAMCET 1992]
  A)
                  \[C{{H}_{3}}COONa\]     done clear
  B)
                  \[{{C}_{2}}{{H}_{5}}OH\] done clear
  C)
                  \[NaCl\]               done clear
  D)
                  \[KOH\] done clear
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• question_answer22)
  The molar conductivity is maximum for the solution of concentration      [DCE 2002]
  A)
                  0.001 M                done clear
  B)
                  0.005 M done clear
  C)
                  0.002 M                done clear
  D)
                  0.004 M done clear
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• question_answer23)
  The unit of molar conductivity is                [DCE 2002]
  A)
                  \[{{\Omega }^{-1}}c{{m}^{-2}}mo{{l}^{-1}}\]       done clear
  B)
                  \[{{\Omega }^{{}}}c{{m}^{-2}}mo{{l}^{-1}}\] done clear
  C)
                  \[{{\Omega }^{-1}}c{{m}^{2}}mo{{l}^{-1}}\]         done clear
  D)
                  \[\Omega \ c{{m}^{2}}mol\] done clear
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• question_answer24)
  The highest electrical conductivity of the following aqueous solutions is of                                           [AIEEE 2005]
  A)
                  0.1 M acetic acid               done clear
  B)
                  0.1 M chloroacetic acid done clear
  C)
                  0.1 M fluoroacetic acid   done clear
  D)
                  0.1 M difluoroacetic acid done clear
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• question_answer25)
  Given \[l/a=0.5c{{m}^{-1}},\,R=50ohm,\,N=1.0\]. The equivalent conductance of the electrolytic cell is [Orissa JEE 2005]
  A)
                  \[10\,oh{{m}^{-1}}c{{m}^{2}}gm\,e{{q}^{-1}}\]  done clear
  B)
                  \[20\,oh{{m}^{-1}}c{{m}^{2}}gm\,e{{q}^{-1}}\] done clear
  C)
                  \[300\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\]   done clear
  D)
                  \[100oh{{m}^{-1}}c{{m}^{2}}\,gme{{q}^{-1}}\] done clear
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• question_answer26)
  If equivalent conductance of \[1M\] benzoic acid is \[12.8oh{{m}^{-1}}c{{m}^{2}}\] and if the conductance of benzoate ion and \[{{H}^{+}}\] ion are 42 and \[288.42\,oh{{m}^{-1}}c{{m}^{2}}\] respectively. its degree of dissociation is                                           [DPMT 2005]
  A)
                  39%        done clear
  B)
                  3.9% done clear
  C)
                  0.35%    done clear
  D)
                  0.039% done clear
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• question_answer27)
  The unit \[oh{{m}^{-1}}\] is used for                                       [J & K 2005]
  A)
                  Molar conductivity          done clear
  B)
                  Equivalent conductivity done clear
  C)
                  Specific conductivity       done clear
  D)
                  Conductivity done clear
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