The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension :Water, alcohol (C_(2)H_(5)OH) and hexane [CH_(3)(CH_(2))_(4)CH_(3))].

The magnitude of surface tension of liquid depends on the attractive f

1.	The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension :Water, alcohol (C_(2)H_(5)OH) and hexane [CH_(3)(CH_(2))_(4)CH_(3))].
Answer» Solution :In the above given molecules, only hexane is non - polar molecules in which only London DISPERSION forces PRESENT. These forces are very weak while both water and alcohol are polar molecules in which H - bonding as well as DIPOLE - dipole interactions are present. However, H - bonding interactions are too stronger in water than therefore, it possesses much stronger intermolecular than alcohol and hexane. So, the INCREASING order is hexane `lt` alcohol `lt` water Higher is the attractive forces between the molecules, higher is the magnitude of surface tension of liquid.