Q. Given below are two statements: Statement I: The boiling points of the following hydrides of group 16 elements increases in the order- $H_2O < H_2S < H_2Se < H_2Te$. Statement II: The boiling points of these hydrides increase with increase in molar mass. In the light of the above statements, choose the most appropriate answer from the options given below:
A) Statements I is incorrect but Statements II is correct.
B) Both Statements I and Statements II are correct
C) Both Statements I and Statements II are incorrect
D) Statements I is correct but Statements II is incorrect
Explanation
[Solution] Due to hydrogen bonding $H_2O$ has the highest boiling point: $H_2S < H_2Se < H_2Te < H_2O$, so the boiling points do not simply rise with molar mass. Both statements are incorrect. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.