Question

Which is chemically most active non-metal?

• A. $S$
• B. $O_2$
• C. $F_2$
• D. $N_2$

Answer 1

Answer: (C)

$F_2$ is most reactive due to:
(1) highest electronegativity
(2) low bond dissociation energy
(3) high heat of hydration of $F^{-}$ ion