Choose the odd one:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Iodine
Option (1) Iodine — a non-metal (a halogen), a dark violet-black solid that turns into violet vapour on heating; so iodine is the odd one out.
Option (2) Sodium — a metal, a soft alkali metal.
Option (3) Iron — a metal, a hard transition metal.
Option (4) Potassium — a metal, a soft alkali metal.