Soot particles:

1.Are also called black carbon

2.Are mostly of coarse size range

3.Are toxic

4.Contribute to global warming

5.Can penetrate into the deeper parts of the lungs

A1, 2, 3 & 4 only

B1, 2, 3 & 5 only

C1, 3, 4 & 5 only ✓ Correct

D2, 3, 4 & 5 only

Correct answer: (C) 1, 3, 4 & 5 only

Explanation

Soot particles are black carbon, are toxic, warm the climate and reach deep into the lungs.

Statement 1 is correct, as soot is commonly called black carbon.

Statement 2 is wrong, since soot is mostly fine, not coarse, in size.

Statement 3 is correct, as soot carries toxic components harmful to health.

Statement 4 is correct, since black carbon absorbs sunlight and contributes to warming.

Statement 5 is correct, as fine soot penetrates deep into lung tissue.

Its small size lets it enter the bloodstream and travel long distances.

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