Question

You are Johnsy, convalescing after the dreadful attack of pneumonia. Mr Behrman died two weeks back. The guilt is giving you sleepless nights. Write a diary entry. 100-120 words.

THE LAST LEAF CLASS 9

Answer 1

Answer:

Physical Change Chemical Change

When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.

Physical change is a temporary change. A chemical change is a permanent change.