The gas that is used in the manufacture of vanaspati ghee is :
1). Oxygen
2). Carbon dioxide
3). Hydrogen
4). Nitrogen
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1. Surface water is a better source of drinking water because it is poor in
2. Alcoholic (– OH) group can be identified by :
3. Select the one which is not a mixture:
4. Cobalt - 60 is commonly used in radiation therapy because it emits-
6. Which of the following is ozone depleting pesticide ?
7. Basicity of boric acid, H3BO3 is
8. Greenhouse effect is caused by