Question

Which of the following compounds is used as refrigerant?

• A. CCI₂F₂
• B. CICH₂CH₂SCH₂CH₂CI
• C. CCI₄
• D. CCI₃NO₂
• E. COCI₂

Answer 1

The Correct Option is A

The compound CCl\(_2\)F\(_2\), also known as Dichlorodifluoromethane, is commonly used as a refrigerant. It is part of the chlorofluorocarbon (CFC) family, which was widely used in refrigeration and air conditioning systems. However, due to environmental concerns regarding ozone depletion, its use has been regulated and phased out in many countries. Other compounds listed, such as CCl\(_4\), are not typically used as refrigerants. CCl\(_2\)F\(_2\) remains a classic example of refrigerant compounds from the CFC category.

The correct option is (A) : CCI₂F₂

Answer 2

The correct answer is CCI₂F₂ (Dichlorodifluoromethane). Let's go through the options:

• CCI₂F₂ (Dichlorodifluoromethane): This compound is commonly known as Freon-12 and is used as a refrigerant in refrigeration and air conditioning systems due to its low toxicity and non-flammability.
• CICH₂CH₂SCH₂CH₂CI (a thiol compound): This compound is not used as a refrigerant. It is more likely to be a chemical used in other organic applications, not related to refrigeration.
• CCI₄ (Carbon Tetrachloride): Although it was historically used as a refrigerant, carbon tetrachloride is now considered hazardous to the ozone layer and is no longer used for refrigeration purposes.
• CCI₃NO₂ (Trichloronitromethane): This compound is not used as a refrigerant. It is more commonly used in chemical synthesis and industrial processes, not refrigeration.
• COCl₂ (Phosgene): Phosgene is a toxic compound and is not used in refrigeration. It is primarily used in the production of chemicals such as plastics and pesticides.

Conclusion: The compound used as a refrigerant in this list is CCI₂F₂ (Dichlorodifluoromethane).