Ultraviolet radiation striking this earth is due to the depletion of
1). carbon monoxide
2). carbon dioxide
3). ozone
4). oxygen
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3. Question 16.1:Why do we need to classify drugs in different ways?
5. Question 15.5:Explain the difference between Buna-N and Buna-S.
6. Peptization is a process of
7. Question 16.22:What are biodegradable and non-biodegradable detergents? Give one example of each.
8. Refrigerators keep food unspoiled because
9. Red phosphorus is less reactive than yellow phosphorus because-