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Topic: General trends, Group 15 and 16· p-Block Elements

Given below are two statements:Statement I : The boiling point of hydrides of Group 16 elements follow the orderH_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 mem…

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:

1. Statement I is false but Statement II is true.

2. Both Statement I and Statement II are true.

3. Both Statement I and Statement II are false.

4. Statement I is true but Statement II is false.

1 answer

Best answer

Answer: 2. Both Statement I and Statement II are true.

Key idea: boiling point of hydrides depends on H-bonding and on molecular mass.

\(\mathrm{H_2O}\) is highest because of extensive H-bonding. Then the order follows size: \(\mathrm{H_2Te>H_2Se>H_2S}\) (stronger van der Waals forces). Statement I is true; Statement II gives the correct reason. Option 2.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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