NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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During electrolysis of sulphuric acid, which of the following processes is possible at anode?

A.

2 {H}_2 {O}({l}) \longrightarrow {O}_2({~g})+4 {H}^{+}({aq})+4 {e}^{-} \stackrel{\ominus}{{E}_{\text {cell }}}=+1.23 {~V}

2 {SO}_4^{2-}({aq}) \longrightarrow {S}_2 {O}_8^{2-}({aq})+2 {e}^{-} \stackrel{\ominus}{{E}_{\text {cell }}}= 1.96 {~V}

Choose the correct option based on following statements.

(i) Process A is preferred at higher concentration of sulphuric acid.

(ii) Process B is preferred at higher concentration of sulphuric acid.

(iii) Process A is preferred for dilute sulphuric acid.

(iv) Process B is preferred for dilute sulphuric acid.

(v) Both A and B are equally possible at higher concentration.

View answer and explanation

Correct option: B

(iii) and (ii)

Option B ((iii) and (ii)) is correct because at higher concentrations of sulphuric acid, process B is preferred, and for dilute sulphuric acid, process A is preferred.

NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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