03. ELECTROCHEMISTRY
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ELECTROCHEMISTRY

20037 The anode half-reaction occurring during the discharge of a lead storage battery is

1 \(Pb(s) + S{O_2} + {O_2} \to PbS{O_4}(s)\)
2 \(Pb(s) + SO_4^{2 - }(aq)\) \(\rightleftharpoons\)  \(PbS{O_4}(s) + 2{e^ - }\)
3 \(Pb{O_2}(s) + 4{H^ + }(aq) + 2{e^ - } + SO_4^{2 - }(aq)\) \(\rightleftharpoons \) \(PbS{O_4}(s) + 2{H_2}O\)
4 \(P{b^{2 + }}(aq) + SO_4^{2 - }(aq) \to PbS{O_4}(s)\)
ELECTROCHEMISTRY

20038 The unit of cell constant is

1 \(oh{m^{ - 1}}\,c{m^{ - 1}}\)
2 \(ohm\,cm\)
3 \(cm\)
4 \(c{m^{ - 1}}\)
ELECTROCHEMISTRY

20039 In dry cell the reaction which takes place at the zinc anode is

1 \(Z{n^{2 + }} + 2{e^ - } \to Zn(s)\)
2 \(Zn(s) \to Z{n^{2 + }} + 2{e^ - }\)
3 \(M{n^{2 + }} + 2{e^ - } \to Mn(s)\)
4 \(Mn(s) \to M{n^ + } + {e^ - } + 1.5V\)
ELECTROCHEMISTRY

20040 The chemical reaction taking place at the anode of a cell is

1 Ionisation
2 Reduction
3 Oxidation
4 Hydrolysis
ELECTROCHEMISTRY

20041 Which of the following reactions occurs at the cathode during the charging of a lead storage battery

1 \(P{b^{2 + }} + 2{e^ - } \to Pb\)
2 \(P{b^{2 + }} + SO_4^{2 - } \to PbS{O_4}\)
3 \(Pb \to P{b^{2 + }} + 2{e^ - }\)
4 \(PbS{O_4} + 2{H_2}O \to 2Pb{O_2} + 4SO_4^{2 - } + 2{e^ - }\)
NEET DIGITAL LIBRARY
ELECTROCHEMISTRY

20037 The anode half-reaction occurring during the discharge of a lead storage battery is

1 \(Pb(s) + S{O_2} + {O_2} \to PbS{O_4}(s)\)
2 \(Pb(s) + SO_4^{2 - }(aq)\) \(\rightleftharpoons\)  \(PbS{O_4}(s) + 2{e^ - }\)
3 \(Pb{O_2}(s) + 4{H^ + }(aq) + 2{e^ - } + SO_4^{2 - }(aq)\) \(\rightleftharpoons \) \(PbS{O_4}(s) + 2{H_2}O\)
4 \(P{b^{2 + }}(aq) + SO_4^{2 - }(aq) \to PbS{O_4}(s)\)
ELECTROCHEMISTRY

20038 The unit of cell constant is

1 \(oh{m^{ - 1}}\,c{m^{ - 1}}\)
2 \(ohm\,cm\)
3 \(cm\)
4 \(c{m^{ - 1}}\)
ELECTROCHEMISTRY

20039 In dry cell the reaction which takes place at the zinc anode is

1 \(Z{n^{2 + }} + 2{e^ - } \to Zn(s)\)
2 \(Zn(s) \to Z{n^{2 + }} + 2{e^ - }\)
3 \(M{n^{2 + }} + 2{e^ - } \to Mn(s)\)
4 \(Mn(s) \to M{n^ + } + {e^ - } + 1.5V\)
ELECTROCHEMISTRY

20040 The chemical reaction taking place at the anode of a cell is

1 Ionisation
2 Reduction
3 Oxidation
4 Hydrolysis
ELECTROCHEMISTRY

20041 Which of the following reactions occurs at the cathode during the charging of a lead storage battery

1 \(P{b^{2 + }} + 2{e^ - } \to Pb\)
2 \(P{b^{2 + }} + SO_4^{2 - } \to PbS{O_4}\)
3 \(Pb \to P{b^{2 + }} + 2{e^ - }\)
4 \(PbS{O_4} + 2{H_2}O \to 2Pb{O_2} + 4SO_4^{2 - } + 2{e^ - }\)
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ELECTROCHEMISTRY

20037 The anode half-reaction occurring during the discharge of a lead storage battery is

1 \(Pb(s) + S{O_2} + {O_2} \to PbS{O_4}(s)\)
2 \(Pb(s) + SO_4^{2 - }(aq)\) \(\rightleftharpoons\)  \(PbS{O_4}(s) + 2{e^ - }\)
3 \(Pb{O_2}(s) + 4{H^ + }(aq) + 2{e^ - } + SO_4^{2 - }(aq)\) \(\rightleftharpoons \) \(PbS{O_4}(s) + 2{H_2}O\)
4 \(P{b^{2 + }}(aq) + SO_4^{2 - }(aq) \to PbS{O_4}(s)\)
ELECTROCHEMISTRY

20038 The unit of cell constant is

1 \(oh{m^{ - 1}}\,c{m^{ - 1}}\)
2 \(ohm\,cm\)
3 \(cm\)
4 \(c{m^{ - 1}}\)
ELECTROCHEMISTRY

20039 In dry cell the reaction which takes place at the zinc anode is

1 \(Z{n^{2 + }} + 2{e^ - } \to Zn(s)\)
2 \(Zn(s) \to Z{n^{2 + }} + 2{e^ - }\)
3 \(M{n^{2 + }} + 2{e^ - } \to Mn(s)\)
4 \(Mn(s) \to M{n^ + } + {e^ - } + 1.5V\)
ELECTROCHEMISTRY

20040 The chemical reaction taking place at the anode of a cell is

1 Ionisation
2 Reduction
3 Oxidation
4 Hydrolysis
ELECTROCHEMISTRY

20041 Which of the following reactions occurs at the cathode during the charging of a lead storage battery

1 \(P{b^{2 + }} + 2{e^ - } \to Pb\)
2 \(P{b^{2 + }} + SO_4^{2 - } \to PbS{O_4}\)
3 \(Pb \to P{b^{2 + }} + 2{e^ - }\)
4 \(PbS{O_4} + 2{H_2}O \to 2Pb{O_2} + 4SO_4^{2 - } + 2{e^ - }\)
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ELECTROCHEMISTRY

20037 The anode half-reaction occurring during the discharge of a lead storage battery is

1 \(Pb(s) + S{O_2} + {O_2} \to PbS{O_4}(s)\)
2 \(Pb(s) + SO_4^{2 - }(aq)\) \(\rightleftharpoons\)  \(PbS{O_4}(s) + 2{e^ - }\)
3 \(Pb{O_2}(s) + 4{H^ + }(aq) + 2{e^ - } + SO_4^{2 - }(aq)\) \(\rightleftharpoons \) \(PbS{O_4}(s) + 2{H_2}O\)
4 \(P{b^{2 + }}(aq) + SO_4^{2 - }(aq) \to PbS{O_4}(s)\)
ELECTROCHEMISTRY

20038 The unit of cell constant is

1 \(oh{m^{ - 1}}\,c{m^{ - 1}}\)
2 \(ohm\,cm\)
3 \(cm\)
4 \(c{m^{ - 1}}\)
ELECTROCHEMISTRY

20039 In dry cell the reaction which takes place at the zinc anode is

1 \(Z{n^{2 + }} + 2{e^ - } \to Zn(s)\)
2 \(Zn(s) \to Z{n^{2 + }} + 2{e^ - }\)
3 \(M{n^{2 + }} + 2{e^ - } \to Mn(s)\)
4 \(Mn(s) \to M{n^ + } + {e^ - } + 1.5V\)
ELECTROCHEMISTRY

20040 The chemical reaction taking place at the anode of a cell is

1 Ionisation
2 Reduction
3 Oxidation
4 Hydrolysis
ELECTROCHEMISTRY

20041 Which of the following reactions occurs at the cathode during the charging of a lead storage battery

1 \(P{b^{2 + }} + 2{e^ - } \to Pb\)
2 \(P{b^{2 + }} + SO_4^{2 - } \to PbS{O_4}\)
3 \(Pb \to P{b^{2 + }} + 2{e^ - }\)
4 \(PbS{O_4} + 2{H_2}O \to 2Pb{O_2} + 4SO_4^{2 - } + 2{e^ - }\)
NEET DIGITAL LIBRARY
ELECTROCHEMISTRY

20037 The anode half-reaction occurring during the discharge of a lead storage battery is

1 \(Pb(s) + S{O_2} + {O_2} \to PbS{O_4}(s)\)
2 \(Pb(s) + SO_4^{2 - }(aq)\) \(\rightleftharpoons\)  \(PbS{O_4}(s) + 2{e^ - }\)
3 \(Pb{O_2}(s) + 4{H^ + }(aq) + 2{e^ - } + SO_4^{2 - }(aq)\) \(\rightleftharpoons \) \(PbS{O_4}(s) + 2{H_2}O\)
4 \(P{b^{2 + }}(aq) + SO_4^{2 - }(aq) \to PbS{O_4}(s)\)
ELECTROCHEMISTRY

20038 The unit of cell constant is

1 \(oh{m^{ - 1}}\,c{m^{ - 1}}\)
2 \(ohm\,cm\)
3 \(cm\)
4 \(c{m^{ - 1}}\)
ELECTROCHEMISTRY

20039 In dry cell the reaction which takes place at the zinc anode is

1 \(Z{n^{2 + }} + 2{e^ - } \to Zn(s)\)
2 \(Zn(s) \to Z{n^{2 + }} + 2{e^ - }\)
3 \(M{n^{2 + }} + 2{e^ - } \to Mn(s)\)
4 \(Mn(s) \to M{n^ + } + {e^ - } + 1.5V\)
ELECTROCHEMISTRY

20040 The chemical reaction taking place at the anode of a cell is

1 Ionisation
2 Reduction
3 Oxidation
4 Hydrolysis
ELECTROCHEMISTRY

20041 Which of the following reactions occurs at the cathode during the charging of a lead storage battery

1 \(P{b^{2 + }} + 2{e^ - } \to Pb\)
2 \(P{b^{2 + }} + SO_4^{2 - } \to PbS{O_4}\)
3 \(Pb \to P{b^{2 + }} + 2{e^ - }\)
4 \(PbS{O_4} + 2{H_2}O \to 2Pb{O_2} + 4SO_4^{2 - } + 2{e^ - }\)