Q18 / 160 · TS EAMCET 2020 (11 Sep Shift 1) · Chemistry

Which of the following molecules is present in photochemical smog?

  • A
    $\mathrm{SO}_2$
  • Correct answer
    B
    $\mathrm{NO}_2$
  • C
    $\mathrm{CO}_2$
  • D
    $\mathrm{CO}$

Solution

Photochemical smog is a type of smog produced, when ultraviolet light from the sun reacts with nitrogen oxides in the atomosphere. It is visible as a brown haze and is most prominent during the morning and afternoon, especially in densey populated, warm cities. Photochemical smog = mixture of ozone, nitric acid, aldehydes, peroxyacyl nitrates and secondary pollutants. Hence, correct option is $\mathrm{NO}_2$.

Hence, the correct answer is option: 'B'.

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