Environmental chemistry questions.

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#	Question
1	The major environmental factor that supports the existence of Null cycle is the photolysis of some radicals in the atmosphere. True OR False
2	To a certain extent global warming must exist in order to maintain good temperature environment for life. True OR False
3	It must be noted that together with anthropogenic CFC inputs into the atmosphere $CH_{3}Cl$ and $CH_{3}Br$ have natural origins too. True OR False
4	Apart from high temperature combustion of fuel $N_{2}O$ can also originate from agricultural activities. True OR False
5	PAN as a reservoir of HONO₂ can help in the transportation of NO₂ from the urban and industrial origin also from cold to warm regions of the atmosphere. True OR False
6	The troposphere and the stratosphere are characterised by higher pressure and in addition, in the stratosphere, the atmosphere is said to be thin. True OR False
7	Ozone concentrations are lower in the troposphere than the stratosphere due to various biological removal. True OR False
8	Much less short-wavelength radiation reaches the stratosphere than the stratosphere. True OR False
9	In relation to ozone destruction, CFCs are less reactive in the troposphere and their photolysis can occur in the stratosphere due to long wave reaching the region. True OR False
10	Photolysis and pyrolysis are chemical changes initiated by light energy which can be absorbed in form of photons. True OR False

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