Question

Consider the following statements: Chlorofluorocarbons, known are ozone-depleting substances, are used

1. In the production of plastic foams
2. In the production of tubeless tyres
3. In cleaning certain electronic components
4. As pressurizing agents in aerosol cans

Which of the statements given above is/are correct?
(a) 1, 2 and 3 only
(b) 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3 and 4

Answer 1

(b)4 only,because cfc's are used only as pressurizing agent in aerosol cans

Answer 2

the ans is (b) only 4