__________ used as refrigerants and aerosol propellants are also greenhouse gases.

Perfluorocarbons

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Sulfur hexafluoride

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Chlorofluorocarbons (CFCs)

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None of above

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Solution

The correct option is C Chlorofluorocarbons (CFCs)
Chlorofluorocarbons (CFCs), once used as refrigerants and aerosol propellants until they were phased out by international agreement, are also greenhouse gases. They damage the ozone layer of the atmosphere.

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Similar questions

	Column I		Column II
A.	Nitrous Oxide	1.	Secondary pollutant from car exhausts
B.	Chlorofluorocarbons (CFCs)	2.	Combustion of fossil fuels, wood
C.	Methane	3.	Refrigerators, aerosols, sprays
D.	Carbon dioxide	4.	Cattle excreta

The gases which are responsible for a phenomenon known as the greenhouse effect are called as ___ .

Column-I	Column-II
A. Nitrous oxide	1. Secondary pollutant from car exhausts
B. Chlorofluorocarbon (CFCs)	2. Combustion of fossil fuels, wood, etc.
C. Methane	3. Denitrification
D. Ozone $(O_{3})$	4. Refrigerators, aerosol, sprays
E. Carbon dioxide	5. Cattle, rice fields, toilets

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