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

Options

A. `Cu+2H_(2)SO_(4)toCuSO_(4)+SO_(2)+2H_(2)O`
B. `S+2H_(2)SO_(3)to3SO_(2)+2H_(2)O`
C. `C+2H_(2)SO_(4)toCO_(2)+2SO_(2)+2H_(2)O`
D. `CaF_(2)+H_(2)SOtoCaSO_(4)+2HF`

Answer

D

Explanation

`overset(+2-1)(CaF_(2))+overset(+1+6-2)(H_(2)SO_(4))tooverset(+2+6-2)(CaSO_(4))+overset(+1-1)(2HF)`
In this reaction ,three is no change in oxidation number of any elements ,present in this reaction .Thus it is not redox reaction