Question

The states of matter depending upon the interparticle distance are shown in the following diagram.
The conditions a, b, c, d are:

• A. a = Increase heat, b = Decrease pressure, c = Increase heat, d = Decrease pressure
• B. a = Increase heat, b = Increase pressure, c = Decrease heat, d = Decrease pressure
• C. a = Decrease heat, b = Increase pressure, c = Increase heat, d = Decrease pressure
• D. a = Decrease heat, b = Increase Pressure, c = Decrease heat, d = Increase pressure

Answer 1

Answer: (A)

a = Increase heat, b = Decrease pressure, c = Increase heat, d = Decrease pressure

According to the question, initially matter molecules are closely packed but when we increase heat and decrease pressure then its molecule's energy increases and they will free to move and able to cancel their molecular attraction.

When we further increase the heat and decrease pressure matter molecules become more free to move.