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Question

Choose the wrong statements.
 
  1. Smoke is present in our atmosphere.
  2. There is no smoke present in our atmosphere.
  3. Smoke is a mixture of gases and is often harmful.
  4. Smoke is a single gas and is often harmful.


Solution

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.

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