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Question

Question: Pick out the correct arrangement of the boiling points of H<sub>2</sub>O, H<sub>2</sub>S, H<sub>2</s...

Pick out the correct arrangement of the boiling points of H2O, H2S, H2Se and H2Te.

A

H­2O > H2Se > H2Te > H2S

B

H2Te > H2Se > H2S > H2O

C

H2O > H2Te > H2Se > H2S

D

H2O > H­2S > H2Se > H2Te

Answer

H2O > H2Te > H2Se > H2S

Explanation

Solution

Water has exceptionally high boiling point due to presence of strong inter molecular H-bonds. After H2O, Vander waal’s forces of attraction increases down the group and their boiling point increases from H2S to H2Te