Given below are two statements. In the light of the above statements, choose the correct answer from the options given below.
Statement I:Classical smog is formed when oxides of nitrogen combine with particulate matter, especially in summer.
Statement II:Classical smog reduces atmospheric visibility to a great extent.
ABoth Statement I and Statement II are true
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false
DStatement I is false but Statement II is true ✓ Correct
Correct answer: (D) Statement I is false but Statement II is true
Explanation
Classical smog forms from sulphur dioxide, smoke and fog in cold, humid winter conditions.
Statement 1 ties it to oxides of nitrogen, particulates and summer, which describes photochemical smog instead.
Because it names the wrong chemistry and season, Statement 1 is false.
Classical smog does hang as a thick grey haze that sharply cuts atmospheric visibility.
Statement 2 about the large drop in visibility is therefore accurate.
The 1952 London smog was a deadly example of this classical, reducing type of smog.
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