Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used 1. in the production of plastic foams 2. in the production of tubeless tyres 3. in cleaning certain electronic components 4. as pressurizing agents in a

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Q: 42 (IAS/2012)
Consider the following statements : Chlorofluorocarbons, known as ozone-depleting substances, are used
1. in the production of plastic foams
2. in the production of tubeless tyres
3. in cleaning certain electronic components
4. as pressurizing agents in aerosol cans
Which of the statements given above is/are correct?

question_subject: 

Ecology

question_exam: 

IAS

stats: 

0,121,190,25,20,121,145

keywords: 

{'chlorofluorocarbons': [0, 0, 0, 2], 'ozone': [3, 0, 3, 5], 'aerosol cans': [0, 0, 0, 1], 'substances': [0, 0, 1, 1], 'plastic foams': [0, 0, 0, 1], 'certain electronic components': [0, 0, 0, 1], 'production': [16, 4, 20, 51]}

The correct answer is 1, 3 and 4 only.

Explanation:

1. Chlorofluorocarbons (CFCs) are indeed used in the production of plastic foams. This is because CFCs are excellent blowing agents that can create the air pockets in foam insulation, cushions, and other materials.

2. CFCs are not used in the production of tubeless tyres. This statement is incorrect.

3. CFCs are used in cleaning certain electronic components. This is because CFCs are non-flammable and non-conductive, making them useful for cleaning delicate electronic equipment.

4. CFCs are also used as pressurizing agents in aerosol cans. This is because CFCs are chemically stable and do not react with other substances, making them ideal for use in pressurized containers.

Therefore, the correct statements are 1, 3 and 4 only.