The organic halogen compound used for refrigeration and air conditioning purposes is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Freon-12
Freons are chlorofluorocarbons (CFCs) of methane and ethane. They are extremely stable, unreactive, non-toxic, non-corrosive and easily liquefiable gases, which makes them ideal for refrigeration and air conditioning. Freon-12, \( \ce{CCl2F2} \), is the most common one. It is made from tetrachloromethane by the Swarts reaction:
\( \displaystyle \ce{CCl4 + 2HF} \xrightarrow{\ce{SbCl5}} \ce{CCl2F2 + 2HCl} \)
So the compound used for refrigeration and air conditioning is Freon-12.
NCERT (2026-27 edition):
Freons
