Question

When a beaker of water is heated its volume increases a little. What actually happens to the particles in the liquid?

• A. They are moving slowly
• B. They are becoming smaller in size
• C. They are becoming bigger in size
• D. They are moving fast

Answer 1

The correct option is D They are moving fast

When water is heated the molecules of water gain energy and move freely. This movement occurs because the intermolecular distance between the molecules increases. Therefore, the volume increases by little, as they start moving apart from each other.