Entry Test MCQ :: Electrochemistry
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11. |
In which of the following reactions occur at cathode? |
A. |
Cu2++2e-? Cu |
B. |
Cu+2e-? Cu2+ |
C. |
Hg + O2 ? HgO |
D. |
Mg + O2 ? MgO |
Answer: Option A
Explanation:
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12. |
Electricity in voltaic cell is produced due to |
A. |
neutralization |
B. |
oxidation |
C. |
reduction |
D. |
both b & c |
Answer: Option D
Explanation:
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13. |
In electrolytic solution conductance of electricity is due to |
A. |
free electrons |
B. |
ions |
C. |
metals |
D. |
electrodes |
Answer: Option B
Explanation:
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14. |
In electrolytic cell electricity carries |
A. |
spontaneous reaction |
B. |
non-wpontaneous reaction |
C. |
neutralization |
D. |
all of above |
Answer: Option B
Explanation:
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15. |
Reaction at anode is called |
A. |
oxidation |
B. |
reduction |
C. |
redox |
D. |
decomposition |
Answer: Option A
Explanation:
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16. |
In an electrolytic cell cathode provides electrons to |
A. |
ve ion |
B. |
?ve ion |
C. |
neutral atom |
D. |
does not provide any electron |
Answer: Option A
Explanation:
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17. |
In Galvanic cell electrons flow from anode to cathode through |
A. |
external electric circuit |
B. |
salt bridge |
C. |
movement of ions |
D. |
all of the above |
Answer: Option A
Explanation:
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18. |
Decrease in oxidation number is called |
A. |
oxidation |
B. |
reduction |
C. |
oxidation-reduction |
D. |
all of above represent same entity |
Answer: Option B
Explanation:
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19. |
For the measurement of standard electrode potential Zn is dipped in |
A. |
1 M ZnO solution |
B. |
1 M ZnSO4 solution |
C. |
1.5 M ZnSO4 solution |
D. |
0.1 M ZnSO4 solution |
Answer: Option B
Explanation:
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20. |
Right half cell contains __________ electrode |
Answer: Option C
Explanation:
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