Which among the following non-metal is liquid at room temperature?
Bromine
Non-metals generally remain either in solid or gaseous forms at room temperature.
Explanation for correct option:
(B) The only exception is bromine() which is a non-metal that remains liquid at room temperature.
Explanation for incorrect options:
(A) Chlorine(Cl) is a non-metal and found in gaseous form.
(C) Mercury () is a metal and liquid at room temperature.
(D) Phosphorus () is a non-metal and found in solid form at room temperature.
Therefore, the correct option is (B).