Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions…

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?

$Cu + 2 H_{2} {SO}_{4} \to {CuSO}_{4} + {SO}_{2} + 2 H_{2} O$
$3 S + 2 H_{2} {SO}_{4} \to 3 {SO}_{2} + 2 H_{2} O$
$C + 2 H_{2} {SO}_{4} \to {CO}_{2} + 2 {SO}_{2} + 2 H_{2} O$
${CaF}_{2} + H_{2} {SO}_{4} \to {CaSO}_{4} + 2 HF$

Solution

${CaF}_{2} + H_{2} {SO}_{4} \to {CaSO}_{4} + 2 HF$
In this reaction, there is no change in oxidation state of any atom.

Asked in: NEET 2016 (Phase 2)

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