A mixture of potassium chlorate ,oxalic acid and sulphuric acid is heated.determine the reaction which element undergoes maximum change in the oxidation number?

Options

A. `S`
B. `H`
C. `Cl`
D. `C`

Answer

3

Explanation

`overset(+5)(KCIO_(3))rarroverset(-1)(KCI)+O_(2)`
` overset(3+)((COOH)_(2))rarr overset(+2)CO+overset(+4)(CO_(2))+H_(2)O`
` overset(+6)(H_(2)SO_(4))rarrH_(2)O+overset(6+)(SO_(3))`
Thsu maximum change is observed for `Cl`.