Multiple choice

Photochemical smog can be suppressed by

  1. nitrogen oxides

  2. hydrocarbons

  3. radical traps

  4. formaldehyde

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Photochemical smog can be suppressed by certain compounds, which act as free radical traps and also by installation of efficient catalytic converters in the automobiles.