Question

please help me in this question​

Answer 1

Answer:

ok

Explanation:

17). I) stratosphere

2)Ozone layer forms due to a combination of the molecular and elemental form of oxygen in the presence of UV rays. When high energy ultraviolet radiations act on the oxygen at the high level of atmosphere ozone is formed.

3) The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons).

4) i think all of these

Answer 2

Answer:

1) (b) Stratosphere

2) (b) Ozone

3) (d) All of these

4) (d) All of these

5) (d) Antarctica

Explanation:

Ozone depleting substances are chemicals that destroy the earth’s protective ozone layer. They include:

chlorofluorocarbons (CFCs)

halon

carbon tetrachloride (CCl4)

methyl chloroform (CH3CCl3)

hydrobromofluorocarbons (HBFCs)

hydrochlorofluorocarbons (HCFCs)

methyl bromide (CH3Br)

bromochloromethane (CH2BrCl)

Ozone layer forms due to a combination of the molecular and elemental form of oxygen in the presence of UV rays. When high energy ultraviolet radiations act on the oxygen at the high level of atmosphere ozone is formed.

Fire extinguishers, aerosol propellents, glue gun are responsible for ozone layer depletion.