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The reddish, eye-irritating haze commonly seen in heavy traffic and crowded areas is caused by which of the following? (i) Oxides of sulphur (ii) Oxides of nitrogen (iii) Carbon dioxide (iv) Mists, smoke and dust (v) Smog

1. (i), (iv) and (v)
2. (iii) only
3. (ii) only
4. (ii) and (v)

Correct answer: (i), (iv) and (v)

Solution

The reddish, irritating haze in polluted areas is smog, which contains smoke, dust, and other suspended particles. Oxides of sulphur also contribute to this polluted haze, while carbon dioxide does not cause it.

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