Question

Alisha finds it difficult to swim for 1500 m, but she walks the same distance easily because the interparticle force between particles of air is that of water.

• A. less than
• B. more than
• C. equal to

Answer 1

The correct option is A less than

The particles of air (gases) have a large space between them and the interparticle force of attraction is very low. We move through these particles while walking. Thus, it does not require a lot of effort to push the particles apart. Water molecules have relatively greater interparticle force and less interparticle space than air. Thus, swimming requires a lot of force to push the water molecular apart and make space between them for our body.