Which one of the following is found in kidney stones?
1). Sodium oxalate
2). Calcium oxalate
3). Sodium chloride
4). Calcium acetate
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1. Which of the following is not a natural source of air pollution ?
2. Which one of the following is used to restore the colour of old oil paintings?
4. Supersonic Jet causes pollution by thinning of
6. What is the covalency of nitrogen in ammonia molecule
7. What are the major pollutants of cigarette smoke?
8. Maximum permissible concentration of copper in drinking water in mg/L is
9. Which one of the following is not a greenhouse gas ?
10. When cone H2S04 is added to dry KNO3 brown fumes are evolved. These fumes are due to