Assertion :When acidified zinc sulphate solution is electrolysed between zinc electrodes, it is zinc that is deposited at the cathode and hydrogen evolution does not take place. Reason: The electrode potential of zinc is more negative than hydrogen as the over voltage for the hydrogen evolution on zinc is quite large.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Zinc is having lower standard reduction potential than hydrogen, so at anode oxidation of zinc takes place and evolution of hydrogen gas takes place at the cathode.
so, the assertion is wrong;
the electrode potential of Zn is $- 0.76$ and that of hydrogen is 0,
so, the reason is correct.

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