Question

Choose the correct sentences:

1 During the process of ozone layer
formation photolysis of an oxygen
molecule yields two O atoms by the
action of UV photon of the
wavelength less than 240 nm and
this phenomenon is called
Photolization

2 UV rays are of 4 types

3 There is a no any natural
mechanism of ozone layer
formation and destruction in the
atmosphere

4 The trade name of
chlorofluorocarbons is Freon​

Answer 1

Answer:

the trade name of chlorofluorocarbons is Freon.