The yellow colour in photochemical smog is due to the presence of____________?
Correct answer: C. Nitrogen dioxide
- A. Sulphur dioxide
- B. Carbon dioxide
- C. Nitrogen dioxide
- D. CFC's
Explanation
Nitrogen dioxide gives photochemical smog its characteristic yellow-brown colour and is produced largely by vehicle combustion. Sulphur dioxide is associated more with industrial pollution and acid rain.
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