Question

Which of the following factor determines the state of a substance?

I. The nature of the intermolecular forces of the particles.
II. Molecular interaction between the particles.

• A. $I$ and $II$
• B. Only $II$
• C. Only $I$
• D. Neither $I$ nor $II$

Answer 1

Answer: (A)

$I$ and $II$

Two factors determine whether a substance is a solid, a liquid, or a gas:

1. The kinetic energies of the particles (atoms, molecules, or ions) that make up a substance.

2. The attractive intermolecular forces between particles that tend to draw the particles together.

In this, both the given statements are correct.

Hence, option $A$ is correct.