Which of the following statements are true in the context of acid rain?

AAcid rain is formed by the combination of chemical air pollutants with atmospheric water droplets

BAcid rain seeping into the ground can dissolve nutrients like magnesium and calcium and release aluminium, harming trees

CNormal rain has a pH between 5.0 and 5.5; acid rain lowers it to 4 or less

DAll of the above ✓ Correct

Correct answer: (D) All of the above

Explanation

All three statements about acid rain are correct, and the complete set holds together.

The first is right: acid rain forms when chemical air pollutants combine with atmospheric water droplets.

The second is right: seeping acid rain dissolves nutrients like magnesium and calcium and frees aluminium, harming trees.

The third is right: normal rain sits near pH 5.0 to 5.5, while acid rain drops it to 4 or below.

Sulphur and nitrogen oxides are the pollutants that acidify the rain.

Acid rain also corrodes marble and limestone monuments.

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