Question

2. Describe the following changes on the basis of different criteria:
(a) Frying a puri
(b) Light coming out of an electric bulb
(c) Sharpening a knife's blade
(d) A tree falling in a storm​

Answer 1

HERE IS YOUR ANSWER:-

a. Puri bulges

b. Disturbs our vision

c. shining

d. loss of life

Answer 2

Answer:

Explanation:

a) Frying puri - chemical change.

This is because during frying, oxidation is taking place which is a chemical change.

b)Light coming out of an electric bulb - chemical change.

This is because for light to form in the bulb, the inert gas present is made to burn by passing electricity, this is a chemical change.

c) Sharpening a knife's blade - physical change.

No new substance is formed, no colour change, and is temporary, thus it i s a physical change.

d) A tree falling in  a  storm -  physical change.

HOPE THIS HELPS YOU...