Q4 of 287 Page 344

CFCs are carbon compounds having both ............... and chlorine.

Fluorine

Chlorofluorocarbons are organic compounds that have carbon, fluorine and chlorine.


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Atmosphere of Earth is rich in .............

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Surface temperature of moon varies from – 190° to ..............

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..............makes soil porous and allows water and air to peneterate deep underground.

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Earthworms are .................which are involved in paedogenesis.