Question

Assertion :If standard reduction potential for the reaction, $A{g}^{+}+e^{-}\to Ag$ is $0.80volt$, then for the reaction, $2A{g}^{+}+2e^{-}\to 2Ag$, it will be $1.60volt$. Reason: If concentration of $A{g}^{+}$ ions is doubled, the electrode potential is also doubled.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is D Assertion is incorrect but Reason is correct

Standard reduction potential value is fixed for each and every metal and it is independent to the concentration of electrolyte;

but, the electrode potential is concentration dependent;

hence, on increasing the concentration of ion, the value of electrode potential also increases.