Question

Given below are two statements :
Statement I: The boiling point of hydrides of Group 16 elements follow the order
H2O > H2Te > H2Se > H2S.
Statement II: On the basis of molecular mass, H2O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H2O, it has higher boiling point.
In the light of the above statements, choose the correct answer from the options given below :

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Answer 1

Answer: (A)

Both Statement I and Statement II are true

Answer 2

1. The boiling point order is determined by molecular mass and hydrogen bonding.

2. $H_2O$ has extensive hydrogen bonding, giving it the highest boiling point.

3. Heavier hydrides ($H_2Te$, $H_2Se$, $H_2S$) follow boiling point trends based on molecular mass.