Question

Oxidation number of iodine varies from

• A. $-1$ to $+1$
• B. $-1$ to $+7$
• C. $+3$ to $+5$
• D. $-1$ to $+5$

Answer 1

Answer: (B)

Maximum oxidation number = Number of valence electrons i.e., $+7$ in iodine
Minimum oxidation number = Number of electron required to acquire noble gas configuration i.e., -1 in iodine