Q.
Given below are two statements:
Statement I : The boiling point of hydrides of Group 16 elements follow the order $H_2O>H_2Te>H_2Se>H_2S$.
Statement II : On the basis of molecular mass, $H_2O$ is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in $H_2O$, it has higher boiling point.
In the light of the above statements, choose the correct answer from the options given below:
A) Statement I is true but Statement II is false.
B) Statement I is false but Statement II is true.
C) Both Statement I and Statement II are true.
D) Both Statement I and Statement II are false.
Explanation
[Solution by Claude - not from source] Boiling points: $H_2O$ (373 K) > $H_2Te$ (232 K) > $H_2Se$ (232... lower) > $H_2S$ (213 K); water's anomaly is due to H-bonding. Both statements are true. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.