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H2O is liquid and H2S is a gas because...

`H_2O` is liquid and `H_2S` is a gas because

A

oxygen forms stronger hydrogen level than sulphur.

B

oxygen is less electronegative than sulphur.

C

atomic radius of oxygen is less than that of sulphur.

D

atomic radius of oxygen is greater than that of sulphur.

Text Solution

Verified by Experts

The correct Answer is:
A
`H_2O` has intermolecular hydrogen bond between its molecules (H—O—H------H—O—H) while `H_2S` has weak Van der Waals forces between its molecules. Hence the molecules of `H_2O` are strongly packed than `H_2S`, thus water is at liquid state at room temperature.
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