In this type of questions, a statement of assertion is fol…

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Assertion Reason Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

In this type of questions, a statement of assertion is followed by a statement of reason

(R). Mark the correct choice as:

Assertion : Hydrides of group- 16 elements show volatility in the order :

Reason : Electronegativity of group-16 elements increases down the group from oxygen to tellurium.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct answer is:

Hydrides of group-16 elements show volatility in the order :

Oxygen is most electronegative than other elements of group-16, it undergoes hydrogen bonding. Due to strong intermolecular hydrogen bonding in , it shows lowest volatility. As the size of the atom increases regularly from sulphur to tellurium, van der Waals' forces of attraction increase and hence volatility decreases from to .