Choose the correct statement among the following about freons. 

1. They are used as a cancer medicine.
2. They are chlorofluorocarbon compounds.
3. These are toxic organic compounds.
4. These are flammable compounds.
Subtopic:  Dichloromethane, Trichloromethane & Tetrachloromethane |
 87%
Level 1: 80%+
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