Smog

Q.

Smog is a combination of:

1. Fog and mist

2. Smoke and fog

3. Fog and oxygen

4. None of these

Q.

Choose the most appropriate answer: Smog is mainly known as a mixture of fog and smoke. It

1. Reduces visibility

2. Causes asthma

3. Leukemia

4. May cause asthma and reduce visibility

Q.

What problems are caused by the presence of the following in excessive amount in the air?

nitrogen dioxide gas

Q.

______ is the combination of smoke and fog.

1. Cloud

2. Smog

3. Mist

4. Flyash