Question

4. Assertion (A): The materials which can be compressed easily are called
soft.
Reason (R): Iron is a hard material.
5. Assertion (A): The process of settling of heavier insoluble particles of a
substance in water is known as decantation.
Reason (R): This process along with sedimentation is used to get clear
water from muddy water.
6. Assertion (A): The explosion of fire crackers is a physical change.
Reason (R): A physical change is a reversible change.​

Answer 1

Answer:

4. Assertion (A): The materials which can be compressed easily are called

soft.

Reason (R): Iron is a hard material.

(A) and (R) are both true but (R) doesn't explain (A).

5. Assertion (A): The process of settling of heavier insoluble particles of a

substance in water is known as decantation.

Reason (R): This process along with sedimentation is used to get clear

water from muddy water.

Both (A) and (R) are correct but (R) doesn't explain (A)

6. Assertion (A): The explosion of fire crackers is a physical change.

Reason (R): A physical change is a reversible change.

(A) is false but (R) is true