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Hot concentrated sulphur acid is a m...

Hot concentrated sulphur acid is a moderately strong oxidising agent. Which of the following reactions does not show oxidising behaviour -

A

`CaF_(2) + H_(2)SO_(4) to CaSO_(4) + 2HF`

B

`Cu + 2H_(2)SO_(4) to CuSO_(4) + SO + 2H_(2)O`

C

`2S + 2H_(2)SO_(4) to 2SO_(2) + 2H_(2)O`

D

`C + 2H_(2) SO_(4) to CO_(2) + 2SO_(2) + 2H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
A
`Caoverset(-1)(F_(2)) + H_(2) overset(+6)(SO_(4)) to Caoverset(+6)(SO_(4)) + 2Hoverset(-1)(F)`. The oxidation state of the pariticipating elements do not change during the course of the reaction . Thus , it is not a redox reaction.
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