Particulate Nature of Matter Class 8 Assertion and Reason Questions

Particulate Nature of Matter Class 8 Assertion and Reason Questions

Particulate Nature of Matter Class 8 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options :

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): Solids have a fixed shape and volume due to strong interparticle attractions.

(R): The particles in solids are free to move around and change their positions.

Answer:

(c) A is true, but R is false.

2. (A): Gases can fill the entire volume of their container.

(R): The interparticle attractions in gases are very strong, allowing particles to stay close together.

Answer:

(c) A is true, but R is false.

3. (A): Melting ice into water involves an increase in interparticle spacing.

(R): The temperature of the substance increases during the melting process.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

4. (A): The particles in liquids are more closely packed than in gases.

(R): Liquids have a definite volume but no fixed shape.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

5. (A): When a solid is heated, its particles gain energy and move faster.

(R): The interparticle forces in solids become weaker when heated.

Answer:

(b) Both A and R are true, but R is not the correct explanation of A.