Choose odd one out from the following:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Bromine
Option (1) Copper — a metal, solid at room temperature, a good conductor of electricity.
Option (2) Iron — a metal, solid at room temperature, used to make steel.
Option (3) Aluminium — a light metal, solid at room temperature, the most common metal in the Earth’s crust.
Option (4) Bromine — a non-metal of the halogen group and a reddish-brown liquid at room temperature, so bromine is the odd one out.