Question

3. Which of the following is not a property of solid? (a) Molecules vibrate at their mean positions (b) Intermolecular space is negligible (c) Molecules are closely packed (d) Intermolecular force of attraction is weak​

Answer 1

Answer:

(D) is correct.

Explanation:

(a) In solids, molecules vibrate in their mean position. But this movement is very very small. So this statement is correct regarding solids.

(b) In solids, intermolecular space is negligible. That's the reason why they are rigid and hard. So, this statement is also correct.

(c) In solids, molecules are closely packed. That's why they have a fixed shape and almost zero compressibility. So, this statement is also correct.

(d) In solids, there is a strong force of attraction that binds the molecules together and gives it a fixed shape. So, this statement is false regarding solids.

Hence answer is option D.