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Objective

Q.1: Air pollution is caused by

(a) Organic and inorganic industrial effluents discharged into rivers.
(b) Presence of high proportion of sulphur dioxide, carbon monoxide and air-borne particulate
materials.
(c) Unwanted sounds from industries, generators, saws and pneumatic and electric drills.
(d) Overdrawing of groundwater.

Q.2 Which of the following are the major water polluting industries?

(i) Tanneries (ii) Chemical industries Brick kilns (iii) Refineries (iv) Brick kilns

(a) (i) and (ii)
(b) (iii) and (iv)
(c) (i) and (iv)
(d) (ii) and (iii)

Q.3: ------------------and ------------------- industries that are responsible for water pollution?

(a) Textile, dying and petroleum refineries
(b) Aluminium and Copper Smelting
(c) Chemical and Cement
(d) Sugar and Edible Oil.

Q.4 When does thermal pollution take place?

(a) Sun heats up the lakes and ponds
(b) Hot water from factories drains into rivers and ponds
(c) When hot oil drains into rivers and lakes
(d) Both (a) and (c)

Q.5: Air pollution is caused because of the high proportion of undesirable gases such as:

(a) Methane (b) hydrogen (c) sulphur dioxide (d) carbon

Q.6:Fly ash phospo-gypsum and iron and steel slags are two major solid wastes
produced by industries. (True/False)

Q.7:Identify the mistakes and rewrite the sentence correctly.

Wastes from nuclear plants cause cancer, birth defects and miscarriages.

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