Malachite is an ore/mineral of
1). Lead
2). Manganese
3). Mercury
4). Copper
3. Which one of the following contributes largely to the greenhouse effect
4. Question 16.10:How do antiseptics differ from disinfectants? Give one example of each.
5. The BOD values of water indicate the
6. The apparatus used to test acidity of aqueous solution is
7. The first organic compound synthesised in the laboratory was