JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank

done Electrolytes and Electrolysis Total Questions - 41

• question_answer1)
  Which of the following will not conduct electricity in aqueous solution    [AMU 1982, 83]
  A)
                  Copper sulphate              done clear
  B)
                  Sugar done clear
  C)
                  Common salt     done clear
  D)
                  None of these done clear
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• question_answer2)
  Strong electrolytes are those which        [MNR 1983]
  A)
                  Dissolve readily in water done clear
  B)
                  Conduct electricity done clear
  C)
                  Dissociate into ions at high dilution done clear
  D)
                  Completely dissociate into ions at all dilutions done clear
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• question_answer3)
  In aqueous solution, strong electrolytes                [AMU 1983, 84]
  A)
                  Are partially ionized done clear
  B)
                  Do not ionise     done clear
  C)
                  Ionise almost completely done clear
  D)
                  Form polymers done clear
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• question_answer4)
  An electrolyte   [KCET 1984; MP PET/PMT 1988]
  A)
                  Forms complex ions in solution done clear
  B)
                  Gives ions only when electricity is passed done clear
  C)
                  Possesses ions even in solid state done clear
  D)
                  Gives ions only when dissolved in water done clear
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• question_answer5)
  Electrolytes when dissolved in water dissociates into ions because           [CPMT 1974, 78; MNR 1983]
  A)
                  They are unstable done clear
  B)
                  The water dissolves it done clear
  C)
                  The force of repulsion increases done clear
  D)
                  The forces of electrostatic attraction are broken down by water done clear
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• question_answer6)
  Electrolyte can conduct electricity because
  A)
                  Their molecules contain unpaired electrons, which are mobile done clear
  B)
                  Their molecules contain loosely held electrons which get free under the influence of voltage done clear
  C)
                  The molecules break up into ions when a voltage is applied done clear
  D)
                  The molecules are broken up into ions when the electrolyte is fused or is dissolved in the solvent done clear
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• question_answer7)
  Which  one of the following metals could not be obtained on electrolysis of aqueous solution of its salts                [IIT 1990]
  A)
                  \[Ag\]   done clear
  B)
                  \[Mg\] done clear
  C)
                  \[Cu\]   done clear
  D)
                  \[Cr\] done clear
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• question_answer8)
  Which of the following aqueous solution will conduct an electric current quite well           [MP PMT 1987]
  A)
                  Glycerol               done clear
  B)
                  \[HCl\] done clear
  C)
                  Sugar     done clear
  D)
                  Pure water done clear
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• question_answer9)
  On the electrolysis of aqueous solution of sodium sulphate, on cathode we get                                 [MP PMT 1992, 2002]
  A)
                  \[Na\]   done clear
  B)
                  \[{{H}_{2}}\] done clear
  C)
                  \[S{{O}_{2}}\]    done clear
  D)
                  \[S{{O}_{3}}\] done clear
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• question_answer10)
  Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]
  A)
                  Anode and cathode        done clear
  B)
                  Cathode and anode done clear
  C)
                  At both the electrodes  done clear
  D)
                  None of the above done clear
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• question_answer11)
  Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution                                                [MP PET 2001]
  A)
                  Sugar     done clear
  B)
                  Sodium Chloride done clear
  C)
                  Sodium Bromide              done clear
  D)
                  Sodium Acetate done clear
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• question_answer12)
  During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]
  A)
                  Time consumed done clear
  B)
                  Electro chemical equivalent of electrolysis done clear
  C)
                  Quantity of electricity passed done clear
  D)
                  Mass of electrons done clear
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• question_answer13)
  When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are  [AIEEE 2002]
  A)
                  Cathode               Anode                 Pure zinc              Pure copper done clear
  B)
                  Impure sample Pure copper done clear
  C)
                  Impure zinc        Impure sample done clear
  D)
                  Pure copper       Impure sample done clear
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• question_answer14)
  In the electrolytic cell, flow of electrons is from [IIT Screening 2003]
  A)
                  Cathode to anode in solution done clear
  B)
                  Cathode to anode through external supply done clear
  C)
                  Cathode to anode through internal supply done clear
  D)
                  Anode to cathode through internal supply done clear
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• question_answer15)
  An electric current is passed through an aqueous solution of the following. Which one shall decompose                [NCERT 1972]
  A)
                  Urea      done clear
  B)
                  Glucose done clear
  C)
                  \[AgN{{O}_{3}}\]              done clear
  D)
                  Ethyl alcohol done clear
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• question_answer16)
  The electric conduction of a salt solution in water depends on the
  A)
                  Shape of its molecules done clear
  B)
                  Size of its molecules done clear
  C)
                  Size of solvent molecules done clear
  D)
                  Extent of its ionization done clear
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• question_answer17)
  A solution of sodium sulphate in water is electrolysed using inert electrodes. The products at the cathode and anode are respectively                [IIT 1987,96]
  A)
                  \[{{H}_{2}},\,\,\,{{O}_{2}}\]         done clear
  B)
                  \[{{O}_{2}},\,\,{{H}_{2}}\] done clear
  C)
                  \[{{O}_{2}},\,\,Na\]         done clear
  D)
                  \[{{O}_{2}},\,\,S{{O}_{2}}\] done clear
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• question_answer18)
  On electrolysing a solution of dilute \[{{H}_{2}}S{{O}_{4}}\] between platinum electrodes, the gas evolved at the anode is                                                 [NCERT 1977, 79; MNR 1980; CBSE PMT 1992]
  A)
                  \[S{{O}_{2}}\]    done clear
  B)
                  \[I{{F}_{5}}\] done clear
  C)
                  \[{{O}_{2}}\]      done clear
  D)
                  \[{{H}_{2}}\] done clear
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• question_answer19)
  The addition of a polar solvent to a solid electrolyte results in                     [NCERT 1973]
  A)
                  Polarization        done clear
  B)
                  Association done clear
  C)
                  Ionization            done clear
  D)
                  Non-liberation of heat done clear
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• question_answer20)
  During the electrolysis of fused \[NaCl,\] which reaction occurs at anode              [NCERT 1973; AFMC 1992; MP PMT 2002]
  A)
                  Chloride ions are oxidized done clear
  B)
                  Chloride ions are reduced done clear
  C)
                  Sodium ions are oxidised done clear
  D)
                  Sodium ions are reduced done clear
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• question_answer21)
  The amount of ion discharged during electrolysis is not directly proportional to  [NCERT 1973]
  A)
                  Resistance done clear
  B)
                  Time done clear
  C)
                  Current done clear
  D)
                  Chemical equivalent of the ion done clear
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• question_answer22)
  Electrolysis of aqueous \[HCl\] solution produces [CPMT 1987]
  A)
                  \[{{H}_{2}}\] gas at the anode done clear
  B)
                  \[{{H}_{2}}\] gas at the cathode done clear
  C)
                  \[C{{l}_{2}}\] gas at the cathode done clear
  D)
                  \[C{{l}_{2}}\] and \[{{O}_{2}}\] gases both at the anode done clear
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• question_answer23)
  During electrolysis of \[NaCl\]solution, part of the reaction is \[N{{a}^{+}}+{{e}^{-}}\to Na.\] This is termed as    [NCERT 1984]
  A)
                  Oxidation            done clear
  B)
                  Reduction done clear
  C)
                  Deposition          done clear
  D)
                  Cathode reaction done clear
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• question_answer24)
  When a solution of an electrolyte is heated the conductance of the solution                                       [KCET 1991]
  A)
                  Increases because of the electrolyte conducts better done clear
  B)
                  Decreases because of the increased heat done clear
  C)
                  Decreases because of the dissociation of the electrolyte is suppressed done clear
  D)
                  Increases because the electrolyte is dissociated more done clear
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• question_answer25)
  The passage of current liberates \[{{H}_{2}}\] at cathode and \[C{{l}_{2}}\] at anode. The solution is        [EAMCET 1979,87]
  A)
                  Copper chloride in water              done clear
  B)
                  \[NaCl\] in water done clear
  C)
                  \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
                  Water done clear
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• question_answer26)
  Pure water does not conduct electricity because it [Manipal MEE  1995]
  A)
                  Has a low boiling point   done clear
  B)
                  Is almost totally unionized done clear
  C)
                  Is neutral done clear
  D)
                  Is readily decomposed done clear
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• question_answer27)
  Which is responsible for electrical conduction of molten sodium chloride                                               [MADT Bihar 1995]
  A)
                  Free electrons done clear
  B)
                  Free ions done clear
  C)
                  Free molecules done clear
  D)
                  Atoms of sodium and chlorine done clear
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• question_answer28)
  In electrolysis of aqueous copper sulphate, the gas at anode and cathode is                                        [AFMC 1995]
  A)
                  \[{{O}_{2}}\] and \[{{H}_{2}}\]   done clear
  B)
                  \[S{{O}_{2}}\] and \[{{H}_{2}}\] done clear
  C)
                  \[{{H}_{2}}\] and \[{{O}_{2}}\]   done clear
  D)
                  \[S{{O}_{3}}\] and \[{{O}_{2}}\] done clear
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• question_answer29)
  Use of electrolysis is       [AFMC 1995]
  A)
                  Electroplating    done clear
  B)
                  Electrorefining done clear
  C)
                  A and B both      done clear
  D)
                  None of these done clear
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• question_answer30)
  Sodium is made by the electrolysis of a molten mixture of about 40% \[NaCl\] and 60% \[CaC{{l}_{2}}\] because [CBSE PMT 1995]
  A)
                  \[CaC{{l}_{2}}\] helps in conduction of electricity done clear
  B)
                  This mixture has a lower melting point than \[NaCl\] done clear
  C)
                  \[C{{a}^{++}}\] can displace \[Na\] from \[NaCl\] done clear
  D)
                  \[C{{a}^{++}}\] can reduce \[NaCl\] to \[Na\] done clear
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• question_answer31)
  Electrolysis is a process in which the cations and anions of the electrolyte are                                      [MP PET 1995]
  A)
                  Hydrated             done clear
  B)
                  Hydrolysed done clear
  C)
                  Charged               done clear
  D)
                  Discharged done clear
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• question_answer32)
  Degree of ionisation of a solution depends upon [BHU 1998]
  A)
                  Temperature     done clear
  B)
                  Nature of the electrolyte done clear
  C)
                  Nature of the solvent    done clear
  D)
                  None of these done clear
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• question_answer33)
  Which of the following is non-electrolytes [KCET (Med.) 1999]
  A)
                  \[NaCl\]               done clear
  B)
                  \[CaC{{l}_{2}}\] done clear
  C)
                  \[{{C}_{12}}{{H}_{22}}{{O}_{11}}\]            done clear
  D)
                  \[C{{H}_{3}}COOH\] done clear
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• question_answer34)
  When a molten ionic hydride is electrolysed [JIPMER 1999]
  A)
                  Hydrogen is liberated at the cathode done clear
  B)
                  Hydrogen is liberated at the anode done clear
  C)
                  There is no reaction done clear
  D)
                  \[{{H}^{-}}\] ions produced migrate to the cathode done clear
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• question_answer35)
  During electrolysis, the species discharged at cathode are [AFMC  2000]
  A)
                  Ions       done clear
  B)
                  Cation done clear
  C)
                  Anion    done clear
  D)
                  All of these done clear
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• question_answer36)
  Electrolysis of molten anhydrous calcium chloride produces [AIIMS 2000]
  A)
                  Calcium done clear
  B)
                  Phosphorus done clear
  C)
                  Sulphur done clear
  D)
                  Sodium done clear
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• question_answer37)
  Which of the following properties of pure metal makes it more useful then the corresponding alloy        [RPET 2000]
  A)
                  It is harder than corresponding alloy done clear
  B)
                  It has high density done clear
  C)
                  It can be extracted easily done clear
  D)
                  It conducts heat and electricity easily done clear
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• question_answer38)
  Which of the following liberate hydrogen on reaction with dilute \[{{H}_{2}}S{{O}_{4}}\]                                               [Roorkee 2000]
  A)
                  \[Fe\]    done clear
  B)
                  \[Cu\] done clear
  C)
                  \[Al\]     done clear
  D)
                  \[Hg\] done clear
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• question_answer39)
  Which one of the following material conducts electricity [Kerala (Med.) 2003]
  A)
                  Diamond done clear
  B)
                  Crystalline sodium chloride done clear
  C)
                  Barium sulphate               done clear
  D)
                  Fused potassium chloride done clear
  E)
                  Molten sulphur done clear
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• question_answer40)
  Which of the following metals will give \[{{H}_{2}}\] on reaction with NaOH                         [RPET 2003]
  A)
                  Mg         done clear
  B)
                  Ba done clear
  C)
                  Ca           done clear
  D)
                  Sr done clear
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• question_answer41)
  Which of the following is not a non electrolyte   [J & K 2005]
  A)
                  Acetic acid           done clear
  B)
                  Glucose done clear
  C)
                  Ethanol done clear
  D)
                  Urea done clear
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