Question

Identify the correct set from the following:

• A. \( CHCl_3 \) - used in production of Freon-12
• B. \( CCl_4 \) - used in production of Freon-22
• C. \( CH_2Cl_2 \) - used as propellant in aerosols
• D. \( DDT \) - first chlorinated organic herbicide

Hint:

Many halogenated organic compounds are used as refrigerants, solvents, or pesticides.

Answer 1

The Correct Option is A

Step 1: Understanding Chemical Applications - Chloroform (\( CHCl_3 \)) is used in the production of Freon-12 (\( CCl_2F_2 \)), a refrigerant. - Carbon tetrachloride (\( CCl_4 \)) is not used in Freon-22 production (incorrect). - Dichloromethane (\( CH_2Cl_2 \)) is not used as a propellant (incorrect). - DDT is an insecticide, but not the first chlorinated herbicide (incorrect). Conclusion Thus, the correct answer is: \[ CHCl_3 \text{ - used in production of Freon-12} \]