Question

When $C{l}_2$ gas reacts with hot and concentrated potassium hydroxide solution, the oxidation number of chlorine changes from:

• A. zero to – 1 and zero to + 3
• B. zero to + 1 and zero to – 3
• C. zero to +1 and zero to –5
• D. zero to –1 and zero to +5

Answer 1

The correct option is D zero to –1 and zero to +5

$3C{l}_2^0+6KOH\to K\stackrel{+5}{C}l{O}_3+5K\stackrel{-1}{C}l+3H_{2}O$