Question

Which of the following halogen exists as a solid at room temperature?

(a) Chlorine

(b) Fluorine

(c) Iodine

(d) Bromine

The question was asked in examination.

My enquiry is from P-Block topic in chapter P-Block Elements of Chemistry – Class 12

Answer 1

Correct answer is (b) Fluorine

To explain: The strength of the van der Waals between molecules forces increases as the size of the halogen increases from fluorine to iodine. As a result, F2 and Cl2 are gases at room temperature, Br2 is a liquid whereas I2 is a solid.