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

C u + 2 H_{2} S O_{4} \to C u S O_{4} + S O_{2} + 2 H_{2} O

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S + 2 H_{2} S O_{4} \to 3 S O_{2} + 2 H_{2} O

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C + 2 H_{2} S O_{4} \to C O_{2} + 2 S O_{2} + 2 H_{2} O

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C a F_{2} + H_{2} S O_{4} \to C a S O_{4} + 2 H F

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Solution

The correct option is D $C a F_{2} + H_{2} S O_{4} \to C a S O_{4} + 2 H F$
$C a F_{2} + H_{2} S O_{4} \to C a S O_{4} + 2 H F$
Here, the oxidation state of every atom remains the same so, it is not a redox reaction.

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C + 2 H_{2} S O_{4} ⟶ C O_{2} + 2 H_{2} O + 2 S O_{2}

C + 2 H_{2} S O_{4} ⟶ C O_{2} + 2 H_{2} O + 2 S O_{2}

S O_{2}

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