Correct option is C
Analysis of the Liquids
Ethyl Alcohol: Ethanol has moderate hydrogen bonding and relatively high vapor pressure. It evaporates faster than water but slower than benzene.
Benzene: Benzene has weaker intermolecular forces compared to ethyl alcohol and water. Its high vapor pressure makes it evaporate the fastest.
Mercury: Mercury has metallic bonding, which is very strong, resulting in a very low vapor pressure. It evaporates the slowest.
Water: Water has strong hydrogen bonding, which makes its evaporation slower compared to ethyl alcohol and benzene but faster than mercury.
Decreasing Order of Evaporability
From the above analysis:
Benzene > Ethyl Alcohol > Water > Mercury