The maximum number of covalent formed by nitrogen is
A). 1
B). 3
C). 3
D). 4
4
Covalency of an atom in a covalent compound is the number of covalent bonds formed by an atom. Maximum covalency of Nitrogen is 4 (example - ammonium ions).
2. An inert gas mixed with oxygen given to patients suffering from restricted breathing is
3. Which one of the following is an ohmic conductor?
4. What are the major pollutants of cigarette smoke?
5. Two elements which can form a large number of compounds are
6. The Chemical formula of Ammonium sulphate is
7. Chemical formula of washing soda is
8. Which type of radiations are absorbed by the upper layer of the atmosphere?
9. The coating of a thin layer of zinc on steel or iron objects is known as
10. For photoelectric effect to take place, the metal used as the cathode should have_________