Question

the surface tension of which of the following liquid is maximum? a)H20 b)C6H6 c)CH3OH d)C2H5OH

Answer 1

Surface tension of water(H2O) is maximum due to hydrogen bonding...
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Answer 2

The surface tension is maximum in $\bold{\mathrm{H}_{2} \mathrm{O}}$.

Option: (a)

Explanation:  

• Water has oxygen which has lone pair of electron. This lone pair gets donated to the hydrogen atom of another molecule of water.

• This is due to vacant orbital in hydrogen. Hence due to the presence of hydrogen bond between two successive molecules of water, the surface tension of water is more. 

• Benzene does not have any oxygen, alcohols usually don’t exhibit as much of hydrogen bond as compared to water. So their surface tension is much lower.

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