Arsenic pollution in groundwater is due to

AOxides of arsenic

BSulphates of arsenic

CAcids of arsenic ✓ Correct

DNitrates of arsenic

Correct answer: (C) Acids of arsenic

Explanation

Arsenic pollution in groundwater arises mainly from the acids of arsenic, its oxyacids dissolved in water.

Arsenic dissolves as arsenite and arsenate, which are the anions of arsenious and arsenic acids.

Simple oxides of arsenic are not the usual dissolved form found in the aquifers.

Sulphates of arsenic are not the principal species behind this groundwater problem.

Nitrates of arsenic likewise are not the main carriers of arsenic in these waters.

The dissolved arsenic changes form with the oxygen level and acidity of the water.

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