Question

A. MCQ s-Choose the correct answers.
1. This method is used to make water safe for
drinking
(a) boiling
(b) candle filters
(c) chlorination (d) all of these
2. Which of these gases is not an air pollutant?
(a) carbon dioxide (b) sulphur dioxide
(d) carbon monoxide
3. Air pollution is caused by
(a) burning of wood
(b) burning of coal
(c) wastes extracted from industries
(d) all of these
(c) oxygen​

Answer 1

Answer:

boiling . CO2 and oxygen , all of these

Answer 2

Answer:

1.  [d] all of these

2. [b] sulphur dioxide

3. [d] all of these

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