Which one of the following is used to restore the colour of old oil paintings?
1). Ozone
2). Hydrogen peroxide
3). Barium peroxide
4). Sodium peroxide
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3. For generation of biogas the materials commonly used are
4. Dry ice is
5. The polymerisation of which of the following is used in manufacturing of polythene in industry ?
7. The gas involved in Bhopal incident was
8. ________ is used for making vinegar.
9. Which one of the following pairs is not correctly matched?
10. Question 14.11:What are the major causes of water pollution? Explain.