Nitrogen

Q.

The supporter of combustion in the air is --------------------

Q.

State two important uses of following non -metal

(a) Nitrogen

Q. Which among the following is a non combustible substance?

1. Glass
2. Charcoal
3. Wood
4. Petrol

Q.

What is the oxidation number of Nitrogen in ${N{O}_3}^{-1}$ ion?

1. - 1

2. +5

3. +3

4. +1

Q.

4 If a burning candle is covered with a glass inverted on top of it. What happens?

Q. Propane has ___ covalent bonds.

1. eight
2. ten
3. six
4. nine

Q. Which among the following is a non combustible substance?

1. Wood
2. Charcoal
3. Petrol
4. Glass

Q. Which region of the flame of a burning candle has incomplete combustion of wax?

1. Outer
2. Middle
3. Innermost
4. Both B and C

Q. Plants directly take up the nitrogen from atmosphere in its gaseous form.

1. True
2. False

Q. [TBQ.II(3)]
is used as a fertilizer.

Q. Plants directly take up the nitrogen from atmosphere in its gaseous form.

1. False
2. True

Q. The best fire extinguisher for inflammable materials is:

1. Water
2. $S{O}_2$
3. $C{O}_2$
4. CO

Q. A highly reactive substance X is stored safely under water. It readily reacts with oxygen to give a compound Y which dissolves in water. The aqueous solution of Y changes blue litmus solution to red. Identify X and Y.

1. X: Carbon
   Y: Carbon dioxide
2. X: Sodium,
   Y: Sodium oxide
3. X: Phosphorus,
   Y: Phosphorus pentoxide
4. X: Potassium,
   Y: Potassium oxide

Q. [TBQ.IV(2)]
List out the uses of nitrogen.