Question

In the reaction,
$IO _{3}^{-}+ SO _{2}+4 H _{2} O \rightarrow I _{2}+ SO _{4}^{2-}+8 H ^{+}$
the coefficient of $SO _{2}$ is:

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

Answer: (C)

Balanced equation is

$2 IO _{3}^{-}+5 SO _{2}+4 H _{2} O \rightarrow I _{2}+5 SO _{4}^{2-}+8 H ^{+}$

The coefficient of $SO _{2}$ is $5 .$