Electrochemistry — Important Questions
ICSE · Class 12 · Chemistry
103 important questions from Electrochemistry for ICSE Class 12 Chemistry, with answers. Includes multiple choice and true false questions.
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Important Questions from Electrochemistry
Which of the following is a rechargeable battery?
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Lead-acid battery
Lead-acid battery is a secondary (rechargeable) cell. Dry cell and mercury cell are primary (non-rechargeable).
In a galvanic cell, the cathode is the negative electrode.
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False
In a galvanic cell, the cathode is the POSITIVE electrode. The anode is negative.
The standard EMF of a Daniell cell (Zn-Cu) is:
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1.10 V
E°cell = E°(Cu²⁺/Cu) − E°(Zn²⁺/Zn) = 0.34 − (−0.76) = 1.10 V
What does the salt bridge in a galvanic cell do?
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Maintains electrical neutrality in both half-cells
The salt bridge allows ion migration to maintain electrical neutrality. Electrons flow only through the external wire.
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