Question

Van der Waals constant (a) for the gases a, b, c, and d are $1.25,3.29,4.28\mathrm{and}0.244$respectively. The gas which is most easily liquified is

Answer 1

Van der Waals force

• It is a weak intermolecular force that is dependent on the distance between atoms or molecules.
• It is the force that draws together nearly all organic liquids and solids, liquefied and solidified gases, and neutral molecules in gases.

Liquefication of Gas

• Van der waals constant (a) is proportional to the intermolecular force.
• The greater the value of the van der Waals constant, the easier it is to liquefy the gas.
• The gases a, b, c, and d have the Van der Waals constant of $1.25,3.29,4.28\mathrm{and}0.244$respectively.
• Here gas c has the highest van der Waals constant$\mathrm{a}=4.28$.

Therefore, The gas which is most easily liquified is gas c