Which of the following are examples of organic pollutants in water? Choose the correct answer from the options given below.

1.Salts

2.Pesticides

3.Dioxins

4.Bases

5.Pigments

A1, 2, 3 only

B2, 3, 4 only

C3, 4, 5 only

D2, 3, 5 only ✓ Correct

Correct answer: (D) 2, 3, 5 only

Explanation

Pesticides, dioxins and pigments are carbon-based organic pollutants in water.

Statement 2, pesticides, are synthetic organic compounds that contaminate water.

Statement 3, dioxins, are toxic organic byproducts of combustion and industry.

Statement 5, pigments, are organic colouring compounds discharged by industry.

Statement 1, salts, and Statement 4, bases, are inorganic substances and are not organic pollutants.

Organic pollutants often raise BOD as microbes work to break them down.

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