Question

The surface tension of which of the following liquids is maximum?

• A. $H_2O$
• B. $C_6H_6$
• C. $CH_3OH$
• D. $C_2H_5OH$

Answer 1

Answer: (A)

$H_2O$

Answer 2

Surface tension of $H_2O$ is maximum due to maximum hydrogen bonding in comparison to $C_6H_6, CH_3OH, C_2H_5OH$. The order of H-bonding is $H_2O > CH_3OH > C_2H_5OH$ (Benzene does not form H-bond).