Question

The ratio of oxidation states of $Cl$ in potassium chloride to that in potassium chlorate is

• A. $\frac{+1}{5}$
• B. $\frac{-1}{5}$
• C. $\frac{-2}{5}$
• D. $\frac{+3}{5}$

Answer 1

Answer: (B)

$K\stackrel{+5}{\mathrm{Cl}}{O}_3\to K\stackrel{-1}{\mathrm{Cl}}+O_2$
Ratio $=\frac{\text{oxidation state Cl in KCl}}{\text{oxidation state of Cl in}KCl{O}_3}$
$=\frac{-1}{5}$