The heats of vaporization of `H_2 O, C_2 H_5 OH "and" CS_2 "are 40.6 kJ" mol^-1, 38.6 kJ mol^-1 "and" 26.8 kJ mol^-1` respectively. The strength of intermolecular forces in these liquids is in the order of __________.

Options

A. `H _(2)O gt C_(2)H_(5)OH gt CS_(2)`
B. `CS_(2) gt C_(2)H_(5)OH gt H_(2)O`
C. `H_(2)O gt CS_(2) gt C_(2)H_(5)OH`
D. `CS_(2) gt H_(2) O gt C_(2) H_(5) OH`

Answer

A

Explanation

Greater the heat of vaporisation greater are the intermolecular forces.