Nitrogen in water is commonly?found in the form of :
1). ?Nitric oxide
2). ?Nitrous oxide
3). Nitrate?
4). ?Nitrite
2. Detergents used for cleaning clothes and utensils contain
4. The material used in solar cells contains
6. The constituents of automobile exhaust that can cause cancer is/are :
7. Catalyst is a substance which
8. The number of waves in n x 10th Bohr's orbit are