Environment Questions, General Study (GK)

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21.

Path of energy flow in an ecosystem is

(a)herbivores- producers-carnivores-decomposers

(b)herbivores-carnivores-producers –decomposers

(c)producers-carnivores-herbivores-decomposers

(d)producers-herbivores-carnivores –decomposers

Comment

Answer is: DNA

22.

Of the following which one pollutes the air of a big city?

(a)Copper

(b)Chromium

(c)Lead

(d)Calcium

Comment

Answer is: CNA

23.

Ozone layer above the surface of Earth provides a shield against

(a)X-rays

(b)UV rays

(c)Gamma rays

(d)IR rays

Comment

Answer is: BNA

24.

The permissible upper limit of Arsenic in water is

(a)0.005 gm/litre

(b)0.005 mg/litre

(d)0.05 gm/litre

Comment

Answer is: CNA

25.

Ground water in the Bengal basin is mostly contaminated by

(a)chromium

(b)lead

(c)cadmium

(d)arsenic

Comment

Answer is: DNA

26.

Heavy metal pollution of water is caused by

(a)domestic sewage

(b)wood burning

(c)acid plants

(d)paints

Comment

Answer is: ANA

27.

Supersonic jet causes pollution by thinning of

(a)O₃ layer

(b)C₂ layer

(c)SO₂ layer

(d)O₂ layer

Comment

Answer is: ANA

28.

Biodegradable wastes can usually be converted into useful substances with the help of

(a)bacteria

(b)nuclear proteins

(c)radioactive substances

(d)viruses

Comment

Answer is: ANA

29.

Which of the following is biodegradable?

(a) Paper

(b)DDT

(c)Aluminium

(d)Plastic

Comment

Answer is: ANA

30.

Which one among the following groups of items contains only biodegradable items?

(a)Wood, grass, plastic

(b)Wood, grass, leather

(c)Fruit peels, lime juice, China clay up

(d)Lime juice, grass, polystyrene cup

Comment

Answer is: BNA

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Environment QuestionsPage 3

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