Question

(B) Classify the following as physical or chemical change.

(vi) Knotting a rope

Answer 1

Definition

Physical change - A change in which no new substance is formed and only there is change in shape, size and state and color is termed as physical change.

Chemical change - A change in which new substances in form of products are formed due to the occurrence of a chemical reaction is termed as chemical change.

Classification

Knotting a rope is a physical change because it causes only the change of shape of rope and does not undergo any chemical reaction.

Final answer - Knotting a rope is a physical change