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

Options

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

Answer

C

Explanation

The following reaction occurs when a mixture of potassium chlorate, oxalic acid and sulphuric acid.
`overset(+1) K overset(+5)Cl overset(-2)O_(3) + overset(+1)H_(2)overset(+3)C_(2)overset(-2)O_(4) + overset(+1)H_(2)overset(+6)S overset(-2)O_(4) to overset(+1)K_(2)overset(+6)Soverset(-2)O_(4) + overset(+1)Koverset(-1)Cl + overset(+4)C overset(-1)O_(2) + overset(+1)H_(2)overset(-2)O`
Thus, the element which undergoes maximum change to the oxidation state is Cl from +3 to +1.