Question

Choose the wrong statements.

• A. Smoke is present in our atmosphere.
• B. There is no smoke present in our atmosphere.
• C. Smoke is a mixture of gases and is often harmful.
• D. Smoke is a single gas and is often harmful.

Answer 1

Answer: (B), (D)

The correct options are
B There is no smoke present in our atmosphere.
D Smoke is a single gas and is often harmful.

Smoke is present in our atmosphere due to burning of fuels. Its occupancy varies from place to place. It is a mixture of gases and is often harmful. Apart from these, dust particles are also present in our atmosphere which we observe when we see a ray of light in a dark room. Smoke and dust particles occupy less than 1% of earth’s atmosphere.