Q8 of 50 Page 475

Give the full form of CFC.

Full for of CFCs is chlorofluorocarbons, commonly known as Freon, CFCs are used in in air-conditioning, refrigeration, blowing agents in foams, insulations and packing materials, propellants in aerosol cans.


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6

Pick the non-biodegradable, substances from the following:

Animal bones, wool, paper, glass.

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Select from the following substances which have posed a threat to the environment:

Aerosols, consumers, bacteria, CFCs.

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What happens during the first step of ozone formation in the atmosphere?

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Choose one consumer each that belongs to the second and third trophic levels from the organisms given below:

Eagle, frog, tiger, rabbit, box.