Entry Test MCQ :: Electrochemistry
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1. |
Which of the following element act as inert electrode |
Answer: Option C
Explanation:
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2. |
If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs? |
A. |
H2 is deposited at cathode |
B. |
Colour of the solution becomes fade |
C. |
Cu is deposited at anode |
D. |
All are possible |
Answer: Option B
Explanation:
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3. |
Stronger the oxidizing agent greater is the |
A. |
Oxidation potential |
B. |
Reduction potential |
C. |
Redox potential |
D. |
emf of cell |
Answer: Option B
Explanation:
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4. |
Which has maximum oxidation number? |
Answer: Option D
Explanation:
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5. |
Which of the following cell is not rechargeable? |
A. |
Lead storage battery |
B. |
Silver oxide cell |
C. |
Fuel cell |
D. |
Ni-Cd cell |
Answer: Option B
Explanation:
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6. |
In an electrolytic cell current flows ? |
A. |
From cathode to anode in outer circuit |
B. |
From anode to cathode outside the cell |
C. |
From cathode to anode inside the cell |
D. |
both b & c |
Answer: Option B
Explanation:
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7. |
Which of the following is true in the case of Zn-Cu cell? |
A. |
The flow of electrons takes place from copper to zinc |
B. |
E0red of copper electrode is less than that of zinc electrode |
C. |
Zinc acts as an anode and copper as cathode |
D. |
All are correct |
Answer: Option C
Explanation:
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8. |
In a galvanic cell |
A. |
Chemical energy is converted into electricity |
B. |
Chemical energy is converted into heat |
C. |
Electrical energy is converted into chemical energy |
D. |
Electrical energy is converted into heat |
Answer: Option A
Explanation:
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9. |
The degree of dissociation of week electrolyte increases as |
A. |
Pressure increases |
B. |
Dilution decreases |
C. |
Dilution increases |
D. |
None |
Answer: Option C
Explanation:
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10. |
Molten NaCl conducts electricity due to the presence of |
A. |
Free electrons |
B. |
Free molecules |
C. |
Free ions |
D. |
Atoms of Na and Cl |
Answer: Option C
Explanation:
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