Doubt from electrochemistry

Question 24 answer key says option A but solution gives reason for answer to be option B which is correct?

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Question 29 please provide reasoning for the answer

May you post that solution of 24
Answer for second question is D

As reduction potential of an element is increasing the element will easily get reduced.

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24th


For 29th answer key says option C

Logic is same for c as d
Also Li does not reduce due to least reduction potential.(in practical)
Reduction potential of H+ is greater than Na+ for Pt electrode

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