JEE Main & Advanced Chemistry Electrochemistry / विद्युत् रसायन Question Bank

done Cell constant and Electrochemical cells Total Questions - 61

• question_answer1)
  When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution [AIIMS 1980]
  A)
                  The positive and negative ions will move towards the anode done clear
  B)
                  The positive ions will start moving towards the anode, the negative ions will stop moving done clear
  C)
                  The negative ions will continue to move towards the anode and the positive ions will stop moving done clear
  D)
                  The positive and negative ions will start moving randomly done clear
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• question_answer2)
  If the half-cell reaction \[A+{{e}^{-}}\to \,{{A}^{-}}\] has a large negative reduction potential, it follows that [MNR 1992; UPSEAT 2000, 02]
  A)
                  \[A\] is readily reduced done clear
  B)
                  \[A\] is readily oxidised done clear
  C)
                  \[{{A}^{-}}\] is readily reduced   done clear
  D)
                  \[{{A}^{-}}\] is readily oxidized done clear
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• question_answer3)
  Mark the false statement            [MP PET 1997]
  A)
                  A salt bridge is used to eliminate liquid junction potential done clear
  B)
                  The Gibbs free energy change, \[\Delta G\] is related with electromotive force \[(E)\], as \[\Delta G=-nFE\] done clear
  C)
                  Nernst equation for single electrode potential is \[E={{E}^{o}}-\frac{RT}{nF}\,\ln \,{{a}_{{{M}^{n+}}}}\] done clear
  D)
                  The efficiency of a hydrogen oxygen fuel cell is 23% done clear
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• question_answer4)
  The specific conductance of a 0.1 N KCl solution at \[{{23}^{o}}C\] is \[0.012\,oh{{m}^{-1\,}}c{{m}^{-1}}\]. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be [CBSE PMT 1999, 2000; KCET 2001]
  A)
                  \[0.142\,c{{m}^{-1}}\]    done clear
  B)
                  \[0.66\,c{{m}^{-1}}\] done clear
  C)
                  \[0.918\,c{{m}^{-1}}\]    done clear
  D)
                  \[1.12\,c{{m}^{-1}}\] done clear
  View Solution play_arrow

• question_answer5)
  Which of the following reactions occurs at the cathode of a common dry cell                                       [NCERT 1978]
  A)
                  \[Mn\,\to \,M{{n}^{2+}}+2{{e}^{-}}\] done clear
  B)
                  \[2Mn{{O}_{2}}+Z{{n}^{2+}}+2{{e}^{-}}\,\to \,\,ZnM{{n}_{2}}{{O}_{4}}\] done clear
  C)
                  \[2Zn{{O}_{2}}+M{{n}^{2+}}+2{{e}^{-}}\,\to \,\,MnZ{{n}_{2}}{{O}_{4}}\] done clear
  D)
                  \[Zn\,\to \,Z{{n}^{2+}}+2{{e}^{-}}\] done clear
  View Solution play_arrow

• question_answer6)
  In \[Cu-Zn\] cell                                                [BHU 1981]
  A)
                  Reduction occurs at the copper cathode done clear
  B)
                  Oxidation occurs at the copper cathode done clear
  C)
                  Reduction occurs at the anode done clear
  D)
                  Chemical energy is converted to light energy done clear
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• question_answer7)
  Which of the following reaction is used to make a fuel cell [AIIMS 2003]
  A)
                  \[Cd(s)+2Ni{{(OH)}_{3}}(s)\to CdO(s)+2Ni(OH)+{{H}_{2}}O(l)\] done clear
  B)
                  \[Pb(s)+Pb{{O}_{2}}(s)+2{{H}_{2}}S{{O}_{4}}(aq)\to 2PbS{{O}_{4}}(s)+2{{H}_{2}}O(l)\] done clear
  C)
                  \[2{{H}_{2}}(g)+{{O}_{2}}(g)\to 2{{H}_{2}}O(l)\] done clear
  D)
                  \[2Fe(s)+{{O}_{2}}(g)+4{{H}^{+}}(aq)\to 2F{{e}^{2+}}(aq)+2{{H}_{2}}O(l)\] done clear
  View Solution play_arrow

• question_answer8)
  When lead storage battery is charged    [MP PET 2003]
  A)
                  \[Pb{{O}_{2}}\]is dissolved          done clear
  B)
                  \[{{H}_{2}}S{{O}_{4}}\]is regenerated done clear
  C)
                  \[PbS{{O}_{4}}\]is deposited on lead electrode done clear
  D)
                  Lead is deposited on lead electrode done clear
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• question_answer9)
  When lead storage battery is charged [MP PET 1993; MP PMT 2000]
  A)
                  Lead dioxide dissolves done clear
  B)
                  Sulphuric acid is regenerated done clear
  C)
                  The lead electrode becomes coated with lead sulphate done clear
  D)
                  The amount of sulphuric acid decreases done clear
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• question_answer10)
  The electrolytic decomposition of dilute sulphonic acid with platinum electrode in cathodic reaction is [MNR 1988; UPSEAT 1999, 2002]
  A)
                  Oxidation done clear
  B)
                  Reduction done clear
  C)
                  Oxidation and reduction both done clear
  D)
                  Neutralisation done clear
  View Solution play_arrow

• question_answer11)
  Which colourless gas evolves, when \[N{{H}_{4}}Cl\] reacts with zinc in a dry cell battery               [Orissa JEE 2003]
  A)
                  \[N{{H}_{4}}\]   done clear
  B)
                  \[{{N}_{2}}\] done clear
  C)
                  \[{{H}_{2}}\]       done clear
  D)
                  \[C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer12)
  Which of the substances \[Na,\,\,Hg,\,\,S,\,\,Pt\] and graphite can be used as electrodes in electrolytic cells having aqueous solutions                                           [AIIMS 1982]
  A)
                  \[Na,\,\,Pt\]and graphite             done clear
  B)
                  \[Na\]and \[Hg\] done clear
  C)
                  \[Pt\]and graphite only done clear
  D)
                  \[Na\]and \[Al\]only done clear
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• question_answer13)
  In electrolysis of dilute \[{{H}_{2}}S{{O}_{4}}\]using platinum electrodes [DPMT 1983; IIT 1983; Kurukshetra CET 2002; AFMC 2005]
  A)
                  \[{{H}_{2}}\] is evolved at cathode done clear
  B)
                  \[N{{H}_{3}}\] is produced at anode done clear
  C)
                  \[C{{l}_{2}}\] is obtained at cathode done clear
  D)
                  \[{{O}_{2}}\] is produced done clear
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• question_answer14)
  For cell reaction, \[Zn+C{{u}^{2+}}\to Z{{n}^{2+}}+Cu,\] cell representation is                                     cell cell                                                [BCECE 2005]
  A)
                  Zn | Zn2+||Cu2+|Cu         done clear
  B)
                  Cu | Cu2+ ||Zn2+| Zn done clear
  C)
                  Cu | Zn2+ || Zn | Cu2+        done clear
  D)
                  Cu2+ | Zn || Zn2+ | Cu done clear
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• question_answer15)
  Which one is not called a anode reaction from the following
  A)
                  \[C{{l}^{-}}\,\to \,\frac{1}{2}C{{l}_{2}}+{{e}^{-}}\]             done clear
  B)
                  \[Cu\,\to \,C{{u}^{++}}+2{{e}^{-}}\] done clear
  C)
                  \[H{{g}^{+}}\,\to \,H{{g}^{++}}+{{e}^{-}}\]           done clear
  D)
                  \[Z{{n}^{2+}}+2{{e}^{-}}\,\to \,Zn\] done clear
  View Solution play_arrow

• question_answer16)
  A cell from the following which converts electrical energy into chemical energy
  A)
                  Dry cell done clear
  B)
                  Electrochemical cell done clear
  C)
                  Electrolytic cell  done clear
  D)
                  None of these done clear
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• question_answer17)
  In the cell \[Zn\,\,|\,\,Z{{n}^{2+}}\,\,||\,\,C{{u}^{2+}}\,\,|\,\,Cu,\] the negative electrode is [MP PMT 1995]
  A)
                  \[Cu\]   done clear
  B)
                  \[C{{u}^{2+}}\] done clear
  C)
                  \[Zn\]    done clear
  D)
                  \[Z{{n}^{2+}}\] done clear
  View Solution play_arrow

• question_answer18)
  Which of the following statements is correct ? Galvanic cell converts       [KCET 1991; MP PMT 1993]
  A)
                  Chemical energy into electrical energy done clear
  B)
                  Electrical energy into chemical energy done clear
  C)
                  Metal from its elemental state to the combined state done clear
  D)
                  Electrolyte into individual ions done clear
  View Solution play_arrow

• question_answer19)
  Hydrogen?oxygen fuel cells are used in space?craft to supply    [MP PMT 1993; MP PET 1999]
  A)
                  Power for heat and light done clear
  B)
                  Power for pressure done clear
  C)
                  Oxygen done clear
  D)
                  Water done clear
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• question_answer20)
  The standard cell potential of \[Zn|Z{{n}^{2+}}_{(aq)}||C{{u}^{2+}}_{(aq)}|Cu\] cell is 1.10 V. The maximum work obtained by this cell will be                          [MP PET 2002]
  A)
                  106.15 kJ              done clear
  B)
                  ? 212.30 kJ done clear
  C)
                  ? 318.45 kJ          done clear
  D)
                  ? 424.60 kJ done clear
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• question_answer21)
  The relationship between standard reduction potential of cell and equilibrium constant is shown by        [MP PET 2002]
  A)
                  \[E_{cell}^{0}=\frac{n}{0.059}\log {{K}_{c}}\]       done clear
  B)
                  \[E_{cell}^{0}=\frac{0.059}{n}\log {{K}_{c}}\] done clear
  C)
                  \[E_{cell}^{0}=0.059\,n\,\log {{K}_{c}}\] done clear
  D)
                  \[E_{cell}^{0}=\frac{\log {{K}_{c}}}{n}\] done clear
  View Solution play_arrow

• question_answer22)
  Consider the Galvanic cell \[\,Z{{n}^{\Theta }}|ZnS{{O}_{4}}||CuS{{O}_{4}}|C{{u}^{\oplus }}\]  the reaction at cathode is           [AMU 2000]
  A)
                  \[Z{{n}^{2}}^{+}+2{{e}^{-}}\to Zn\] done clear
  B)
                  \[C{{u}^{2+}}+2{{e}^{-}}\to Cu\] done clear
  C)
                  \[C{{u}^{2+}}+Zn\to Cu+Z{{n}^{2+}}\]    done clear
  D)
                  \[Z{{n}^{2+}}+Cu\to Zn+C{{u}^{2+}}\] done clear
  View Solution play_arrow

• question_answer23)
  The cell reaction \[Cu+2A{{g}^{+}}\to C{{u}^{+2}}+Ag\] is best represented by                                   [AMU 2000]
  A)
                  \[C{{u}_{(s)}}|C{{u}^{+2}}_{(aq)}||A{{g}^{+}}_{(aq)}|A{{g}_{(s)}}\] done clear
  B)
                  \[Pt|C{{u}^{+2}}||A{{g}^{+}}_{(aq)}|A{{g}_{(s)}}\] done clear
  C)
                  \[C{{u}^{+2}}|Cu||Pt|Ag\] done clear
  D)
                  None of the above representations done clear
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• question_answer24)
  \[\underset{\text{(anode)}\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{Z{{n}_{(s)}}|Z{{n}^{2+}}_{(aq)}|}}\,|\underset{\text{(cathode)}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{u}^{2+}}_{(aq)}|C{{u}_{(s)}}}}\,\]is                 [Kerala (Engg.) 2002]
  A)
                  Weston cell        done clear
  B)
                  Daniel cell done clear
  C)
                  Calomel cell        done clear
  D)
                  Faraday cell done clear
  E)
                  Standard cell done clear
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• question_answer25)
  The specific conductance of a solution is 0.2 \[oh{{m}^{-1}}c{{m}^{-1}}\]and conductivity is 0.04 \[oh{{m}^{-1}}\]. The cell constant would be                                   [RPET 1999]
  A)
                  1 \[c{{m}^{-1}}\]               done clear
  B)
                  0 \[c{{m}^{-1}}\] done clear
  C)
                  5 \[c{{m}^{-1}}\]               done clear
  D)
                  0.2 \[c{{m}^{-1}}\] done clear
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• question_answer26)
  If the conductance and specific conductance of a solution is one then its cell constant would be                 [RPET 1999]
  A)
                  1              done clear
  B)
                  Zero done clear
  C)
                  0.5          done clear
  D)
                  4 done clear
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• question_answer27)
  Saturated solution of \[KN{{O}_{3}}\] is used to make ?salt-bridge? because                                         [IIT Screening 2002]
  A)
                  Velocity of \[{{K}^{+}}\] is greater than that of \[NO_{3}^{-}\] done clear
  B)
                  Velocity of \[NO_{3}^{-}\] is greater than that of \[{{K}^{+}}\] done clear
  C)
                  Velocities of both \[{{K}^{+}}\]and \[NO_{3}^{-}\] are nearly the same done clear
  D)
                  \[KN{{O}_{3}}\]is highly soluble in water done clear
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• question_answer28)
  In balancing the half reaction \[{{S}_{2}}O_{3}^{2-}\to {{S}_{(s)}}\] the number of electrons that must be added is                [DPMT 2000]
  A)
                  4 on the left       done clear
  B)
                  3 on the right done clear
  C)
                  2 on the left       done clear
  D)
                  2 on the right done clear
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• question_answer29)
  Which one of the following statement is true for a electrochemical cell                  [Pb. PMT 1999; KCET 1999]
  A)
                  \[{{H}_{2}}\]is cathode and \[Cu\] is anode done clear
  B)
                  \[{{H}_{2}}\] is anode and \[Cu\] is cathode done clear
  C)
                  Reduction occurs at \[{{H}_{2}}\]electrode done clear
  D)
                  Oxidation occurs at \[Cu\] electrode done clear
  View Solution play_arrow

• question_answer30)
  In the reaction                 \[Cu(s)+2A{{g}^{+}}(aq)\to C{{u}^{2+}}(aq)+2Ag(s)\]                 The reduction half-cell reaction is                             [AIIMS 1997]
  A)
                  \[Cu+2{{e}^{-}}\to C{{u}^{2-}}\]                done clear
  B)
                  \[Cu-2{{e}^{-}}\to C{{u}^{2+}}\] done clear
  C)
                  \[A{{g}^{+}}+{{e}^{-}}\to Ag\]    done clear
  D)
                  \[Ag-{{e}^{-}}\to A{{g}^{+}}\] done clear
  View Solution play_arrow

• question_answer31)
  Which of the following statements about galvanic cell is incorrect             [JIPMER 1997]
  A)
                  Anode is positive done clear
  B)
                  Oxidation occurs at the electrode with lower reduction potential done clear
  C)
                  Cathode is positive done clear
  D)
                  Reduction occurs at cathode done clear
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• question_answer32)
  The molar conductances of \[NaCl,\,HCl\] and \[C{{H}_{3}}COONa\] at infinite dilution are 126.45, 426.16 and \[91\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] respectively. The molar conductance of \[C{{H}_{3}}COOH\] at infinite dilution is             [CBSE PMT 1997]
  A)
                  \[201.28\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] done clear
  B)
                  \[390.71\,oh{{m}^{-1}}c{{m}^{2}}\,mo{{l}^{-1}}\] done clear
  C)
                  \[698.28\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] done clear
  D)
                  \[540.48\,oh{{m}^{-1}}c{{m}^{2}}\,mo{{l}^{-1}}\] done clear
  View Solution play_arrow

• question_answer33)
  The electrodes of a conductivity cell are \[3\,cm\] apart and have a cross-sectional area of \[4\,c{{m}^{2}}\]. The cell constant of the cell (in \[c{{m}^{-1}}\]) is
  A)
                  \[4\times 3\]      done clear
  B)
                  \[4/3\] done clear
  C)
                  \[3/4\] done clear
  D)
                  \[9/4\] done clear
  View Solution play_arrow

• question_answer34)
  The anode half-reaction occurring during the discharge of a lead storage battery is
  A)
                  \[Pb(s)+S{{O}_{2}}+{{O}_{2}}\to PbS{{O}_{4}}(s)\] done clear
  B)
                  \[Pb(s)+SO_{4}^{2-}(aq)\]⇌\[PbS{{O}_{4}}(s)+2{{e}^{-}}\] done clear
  C)
                  \[Pb{{O}_{2}}(s)+4{{H}^{+}}(aq)+2{{e}^{-}}+SO_{4}^{2-}(aq)\]⇌ \[PbS{{O}_{4}}(s)+2{{H}_{2}}O\] done clear
  D)
                  \[P{{b}^{2+}}(aq)+SO_{4}^{2-}(aq)\to PbS{{O}_{4}}(s)\] done clear
  View Solution play_arrow

• question_answer35)
  The unit of cell constant is            [MP PET 1996]
  A)
                  \[oh{{m}^{-1}}\,c{{m}^{-1}}\]     done clear
  B)
                  \[ohm\,cm\] done clear
  C)
                  \[cm\]   done clear
  D)
                  \[c{{m}^{-1}}\] done clear
  View Solution play_arrow

• question_answer36)
  In dry cell the reaction which takes place at the zinc anode is [MP PET 1996]
  A)
                  \[Z{{n}^{2+}}+2{{e}^{-}}\to Zn(s)\] done clear
  B)
                  \[Zn(s)\to Z{{n}^{2+}}+2{{e}^{-}}\] done clear
  C)
                  \[M{{n}^{2+}}+2{{e}^{-}}\to Mn(s)\] done clear
  D)
                  \[Mn(s)\to M{{n}^{+}}+{{e}^{-}}+1.5V\] done clear
  View Solution play_arrow

• question_answer37)
  The chemical reaction taking place at the anode of a cell is [MP PET 1996]
  A)
                  Ionisation            done clear
  B)
                  Reduction done clear
  C)
                  Oxidation            done clear
  D)
                  Hydrolysis done clear
  View Solution play_arrow

• question_answer38)
  Which of the following reactions occurs at the cathode during the charging of a lead storage battery [Manipal MEE 1995; MP PET 2002]
  A)
                  \[P{{b}^{2+}}+2{{e}^{-}}\to Pb\] done clear
  B)
                  \[P{{b}^{2+}}+SO_{4}^{2-}\to PbS{{O}_{4}}\] done clear
  C)
                  \[Pb\to P{{b}^{2+}}+2{{e}^{-}}\] done clear
  D)
                  \[PbS{{O}_{4}}+2{{H}_{2}}O\to 2Pb{{O}_{2}}+4SO_{4}^{2-}+2{{e}^{-}}\] done clear
  View Solution play_arrow

• question_answer39)
  A depolarizer used in dry cell batteries is               [NCERT 1981]
  A)
                  Ammonium chloride       done clear
  B)
                  Manganese dioxide done clear
  C)
                  Potassium hydroxide     done clear
  D)
                  Sodium phosphate done clear
  View Solution play_arrow

• question_answer40)
  When a lead storage battery is discharged [IIT 1987; MP PMT 2004]
  A)
                  \[F{{e}^{2+}}\]is evolved done clear
  B)
                  Lead sulphate is consumed done clear
  C)
                  Lead is formed done clear
  D)
                  Sulphuric acid is consumed done clear
  View Solution play_arrow

• question_answer41)
  In electroplating, the article to be electroplated serves as [AMU 1982, 83]
  A)
                  Cathode               done clear
  B)
                  Electrolyte done clear
  C)
                  Anode  done clear
  D)
                  Conductor done clear
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• question_answer42)
  The position of some metals in the electrochemical series in decreasing electropositive character is given as \[Mg>Al>Zn>Cu>Ag.\] What will happen, if a copper spoon is used to stir a solution of aluminium nitrate [NCERT 1977]
  A)
                  The spoon will get coated with \[Al\] done clear
  B)
                  An alloy of \[Cu\] and \[Al\] is formed done clear
  C)
                  The solution becomes blue done clear
  D)
                  There is no reaction done clear
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• question_answer43)
  In a electrochemical cell                [AFMC 1989]
  A)
                  Potential energy changes into kinetic energy done clear
  B)
                  Kinetic energy changes into potential energy done clear
  C)
                  Chemical energy changes into electrical energy done clear
  D)
                  Electrical energy changes into chemical energy                 done clear
  View Solution play_arrow

• question_answer44)
  In galvanic cell,  the salt bridge is used to               [MP PMT 2002]
  A)
                  Complete the circuit       done clear
  B)
                  Reduce the electric resistance in the cell done clear
  C)
                  Separate cathode from anode done clear
  D)
                  Carry salts for the chemical reaction done clear
  View Solution play_arrow

• question_answer45)
  If a strip of \[Cu\] metal is placed in a solution of ferrous sulphate            [NCERT 1974; CPMT 1977; MP PET 2000]
  A)
                  Copper will precipitate out done clear
  B)
                  Iron will precipitate out done clear
  C)
                  Copper will dissolve done clear
  D)
                  No reaction will take place done clear
  View Solution play_arrow

• question_answer46)
  Which of the following is not used to construct salt bridge            [MP PET 2003]
  A)
                  \[C{{H}_{3}}COOK\]        done clear
  B)
                  \[KCl\] done clear
  C)
                  \[N{{H}_{4}}N{{O}_{3}}\]              done clear
  D)
                  \[KN{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer47)
  The reference electrode is made by using            [MP PMT 2002]
  A)
                  \[ZnC{{l}_{2}}\] done clear
  B)
                  \[CuS{{O}_{4}}\] done clear
  C)
                  \[HgC{{l}_{2}}\] done clear
  D)
                  \[H{{g}_{2}}C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer48)
  In a hydrogen ? oxygen fuel cell, combustion of hydrogen occurs to                                        [AIEEE 2004]
  A)
                  Produce high purity water done clear
  B)
                  Create potential difference between the two electrodes done clear
  C)
                  Generate heat  done clear
  D)
                  Remove adsorbed oxygen from electrode surfaces done clear
  View Solution play_arrow

• question_answer49)
  \[{{\lambda }_{ClC{{H}_{2}}COONa}}=224\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\],                 \[{{\lambda }_{NaCl}}=38.2\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\],                  \[{{\lambda }_{HCl}}=203\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\],                         What is the value of \[{{\lambda }_{ClC{{H}_{2}}COOH}}\]                           [JEE Orissa 2004]
  A)
                  \[288.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done clear
  B)
                  \[289.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done clear
  C)
                  \[388.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\]                done clear
  D)
                  \[59.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done clear
  View Solution play_arrow

• question_answer50)
  Which of the following statement is true for the electrochemical Daniel cell                                         [AIIMS 2004]
  A)
                  Electrons flow from copper electrode to zinc electrode done clear
  B)
                  Current flows from zinc electrode to copper electrode done clear
  C)
                  Cations move toward copper electrode which is cathode              done clear
  D)
                  Cations move toward zinc electrode done clear
  View Solution play_arrow

• question_answer51)
  Which of the following statement is true for an electrochemical cell                                         [Pb.CET 2002]
  A)
                  \[{{H}_{2}}\]is cathode and \[Cu\]is anode done clear
  B)
                  \[{{H}_{2}}\] is anode and Cu is cathode done clear
  C)
                  Reduction occurs at \[{{H}_{2}}\]electrode done clear
  D)
                  Oxidation occurs at Cu electrode done clear
  View Solution play_arrow

• question_answer52)
  Which of the following statements are true for an fuel cells [DPMT 2004]
  A)
                  They run till the reactants are active  done clear
  B)
                  They are free from pollution done clear
  C)
                  They are more efficient                done clear
  D)
                  All of the above done clear
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• question_answer53)
  For gold plating, the electrolyte used is  [Pb.CET 2004]
  A)
                  \[AuC{{l}_{3}}\]                done clear
  B)
                  \[HAuC{{l}_{4}}\] done clear
  C)
                  \[k[Au{{(CN)}_{2}}]\]     done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer54)
  The acid used in lead storage battery is  [Pb.CET 2003]
  A)
                  \[{{H}_{2}}S{{O}_{4}}\]  done clear
  B)
                  \[{{H}_{3}}P{{O}_{4}}\] done clear
  C)
                  HCl         done clear
  D)
                  \[HN{{O}_{3}}\] done clear
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• question_answer55)
  At 25°C specific conductivity of a normal solution of KCl is 0.002765 mho. The resistance of cell is 400 ohms. The cell constant is                                          [Pb.PMT 2004]
  A)
                  0.815     done clear
  B)
                  1.016 done clear
  C)
                  1.106     done clear
  D)
                  2.016 done clear
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• question_answer56)
  Which of the following is used widely in the manufacture of lead storage battery              [BHU 2004]
  A)
                  Arsenic done clear
  B)
                  Lithium done clear
  C)
                  Bismuth               done clear
  D)
                  Antimony done clear
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• question_answer57)
  The chemical reaction, \[2AgCl(s)+{{H}_{2}}(g)\ \to \] \[2HCl(aq)+2Ag(s)\] taking place in a galvanic cell is represented by the notation                                                 [AIIMS 2005]
  A)
                  \[Pt|{{H}_{2}}(g),1\text{bar }\!\!|\!\!\text{ 1}M\ KCl(aq)|AgCl(s)|Ag(s)\] done clear
  B)
                  \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)||1M\ A{{g}^{+}}(aq)|Ag(s)\] done clear
  C)
                  \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|AgCl(s)|Ag(s)\] done clear
  D)
                  \[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|Ag(s)|AgCl(s)\] done clear
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• question_answer58)
  If the \[Z{{n}^{2+}}/Zn\] electrode is diluted to 100 times then the change in e.m.f.         [DPMT 2005]
  A)
                  Increase of \[59\,mV\] done clear
  B)
                  Decrease of \[59\,mV\] done clear
  C)
                  Increase of \[29.5\,mV\] done clear
  D)
                  Decrease of \[29.5\,mV\] done clear
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• question_answer59)
  If hydrogen electrode dipped in 2 solution of \[pH=3\] and \[pH=6\] and salt bridge is connected the e.m.f. of resulting cell is     [DPMT 2005]
  A)
                  0.177 V done clear
  B)
                  0.3 V done clear
  C)
                  0.052 V done clear
  D)
                  0.104 V done clear
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• question_answer60)
  The tendency of an electrode to lose electrons is known as [J & K 2005]
  A)
                  Electrode potential         done clear
  B)
                  Reduction potential done clear
  C)
                  Oxidation potential         done clear
  D)
                  e.m.f. done clear
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• question_answer61)
  When electric current is supplied through an ionic hydride of fused state, then                  [Kerala CET 2005]
  A)
                  Hydrogen is obtained at anode done clear
  B)
                  Hydrogen is obtained at cathode done clear
  C)
                  No change done clear
  D)
                  Hydride ion moves towards cathode done clear
  E)
                  hydride ion present in solution done clear
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