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  4. Assertion: Cu2+ ions get reduced more easily than H+ ions. Reason: Standard electrode potential of copper is 0.34 V.

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Q. Assertion : $Cu^{2+}$ ions get reduced more easily than $H^+$ ions.
Reason : Standard electrode potential of copper is $0.34\, V$.

Electrochemistry

Solution:

Cu is placed above hydrogen in electrochemical series. So, Cu is having more reduction potential than Hydrogen. We know that more the reduction potential more easily the element gets reduced and acts as a good oxidising agent.
Hence, $Cu ^{2+}$ is reduced more easily than $H ^{+}$.
$Cu ^{2+}$ is reduced more easily than $H ^{+}$because of Copper having higher electrode potential than Hydrogen and hence reason is the correct explanation for Assertion.