Question

In a reaction $KCl$ is converted into $KCl{O}_4$.Change in oxidation number is

• A. 3
• B. 5
• C. 7
• D. 8

Answer 1

Answer: (D)

$\underset{\stackrel{\uparrow }{-1}}{\mathrm{KCl}}\to \underset{\stackrel{\uparrow }{+7}}{KCl{O}_4}$
Change $=7-(-1)=8$