With reference to refrigerants, consider the following statements: 1. Hydrofluorocarbons can be the alternatives to ozone-destroying chlorofluorocarbons in refrigeration. 2. Hydrofluorocarbons do not have any global warming potential. Which of the stateme

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Q: 48 (IES/2015)
With reference to refrigerants, consider the following statements:
1. Hydrofluorocarbons can be the alternatives to ozone-destroying chlorofluorocarbons in refrigeration.
2. Hydrofluorocarbons do not have any global warming potential.
Which of the statements given above is/are correct?

question_subject: 

Ecology

question_exam: 

IES

stats: 

0,89,35,89,6,16,13

keywords: 

{'refrigerants': [0, 0, 0, 1], 'hydrofluorocarbons': [0, 0, 0, 2], 'refrigeration': [0, 0, 0, 1], 'chlorofluorocarbons': [0, 0, 0, 2], 'global warming potential': [0, 0, 0, 1], 'ozone': [3, 0, 3, 5]}

The correct answer is option 1, which states that only statement 1 is correct.

Statement 1 is correct because hydrofluorocarbons (HFCs) can be used as alternatives to ozone-destroying chlorofluorocarbons (CFCs) in refrigeration. CFCs were widely used as refrigerants in the past, but they were found to deplete the ozone layer. HFCs were developed as a replacement for CFCs, as they do not harm the ozone layer.

However, statement 2 is incorrect. HFCs do have global warming potential. While they do not deplete the ozone layer, they are still greenhouse gases that contribute to global warming when released into the atmosphere. HFCs have high global warming potentials, which means that they have a much greater warming effect compared to other gases such as carbon dioxide.

Therefore, only statement 1 is correct. It is important to choose refrigerants that have minimal impact on both the ozone layer and global warming to mitigate the negative environmental effects.

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