Q. . Consider the following statements with respect to Chlorofluorocarbons (CFCs):
1. Chlorofluorocarbons (CFCs) are toxic and flammable chemicals containing atoms of carbon, chlorine, and fluorine.
2. CFCs are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials.
Which of the statements given above is/are correct?
Answer: B
Notes:
About Chlorofluorocarbons (CFCs):
- Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
- They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.
- CFCs are classified as halocarbons, a class of compounds that contain atoms of carbon and halogen atoms.
- Individual CFC molecules are labeled with a unique numbering system.
- For example, the CFC number of 11 indicates the number of atoms of carbon, hydrogen, fluorine, and chlorine (e.g. CCl3F as CFC-11).
- The best way to remember the system is the “rule of 90” or add 90 to the CFC number where the first digit is the number of carbon atoms (C), the second digit is the number of hydrogen atoms (H), and the third digit is number of the fluorine atoms (F).
Source: EPIC January 2022
