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Environmental Chemistry

Multiple Choice Questions

91.

Assertion : Photochemical smog is produced by nitrogen oxides.

Reason : Vehicular pollution is a major source of nitrogen oxides.

If both assertion and reason are true and the reason is the correct explanation of the assertion.
If both assertion and reason are true and the reason is not the correct explanation of the assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

92.
Among the following, the one which is not a "green house gas", is

N₂O

CO₂

CH₄

O₂

O₂

O₂ is not a green house gas because it does not have the ability to trap thermal radiation. N₂O, CO₂ and CH₄ have the ability to trap the thermal radiation.