Question

A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?
A. `Cl`
B. `C`
C. `S`
D. `H`

Answer 1

Correct Answer - A
`overset(+1)(K)overset(+5-2)(CIO_(3))+overset(+1)(H_(2))overset(+3-2)(C_(2)O_(4))+overset(+1)(H_(2))overset(+6-2)(SO_(4)) rarr overset(+1)(K_(2))overset(+6-2)(SO_(4))+overset(+1)(K)overset(-1)(CI)+overset(+4-2)(CO_(2))+overset(+1-2)(H_(2)O)`
`:. Cl` is the element which undergoes maximum change in the oxidation state.