Tag: chemistry

Questions Related to chemistry

Nitrolim is obtained by heating calcium carbide in :

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. $ \mathrm{H} _{2}$

  2. $ \mathrm{O} _{2}$

  3. $ \mathrm{N} _{2}$

  4. $ \mathrm{N}\mathrm{H} _{3}$

Show answer
Correct Option: C
Explanation:

$ CaC _2 + N _2 \rightarrow CaNCN + C$


Nitrolim is $CaNCN $.

Option C is correct.


The molecular formula of Calcium cyanamide is :

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. $CaCN _{2}$

  2. $CaCHNH _{2}$

  3. $CaC _{2}N _{2}$

  4. $Ca(CN) _{2}$

Show answer
Correct Option: A
Explanation:

 $CaNCN$ or $CaCN _2$ is the molecular formula of calcium cyanamide. 

Hydride of nitrogen is called:

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. dinitrogen hydride

  2. urea

  3. ammonia

  4. nitrous hydride

Show answer
Correct Option: C
Explanation:

Hydride of nitrogen is called as ammonia. The molecular formula of ammonia is $NH _3$.

Which of the following is not the application of nitrogen?

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. Refrigerant

  2. Metallurgy

  3. Match sticks

  4. Electric bulbs

Show answer
Correct Option: C
Explanation:

Liquid nitrogen is a cryogenic liquid. Like dry ice, the main use of liquid nitrogen is as a refrigerant. 

 Nitrogen is used to provide an inert atmosphere in metallurgy to prevent oxidation in certain industrial processes.
You can't fill a bulb with air or combustion of hot tungsten wire at high temperature will take place in presence of oxygen. You can't maintain vacuum either or external atmospheric pressure will break the glass. So, you have to fill it with non-reactive gas like nitrogen.

The explosive compound of $N _2$ is:

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. $N _2O _5$

  2. $NH _3$

  3. $NF _3$

  4. $NCl _3$

Show answer
Correct Option: D
Explanation:

Nitrogen trichloride $ { NCl } _{ 3 } $ is a dense, volatile, and explosive liquid.

Nitrogen is inert because:

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. it supports combustion

  2. of low boiling point

  3. of high electronegativity

  4. dissociation energy of its molecule is fairly high

Show answer
Correct Option: D
Explanation:

The triple bond is pretty strong. Therefore, it needs a lot of energy to break those bonds and participate in a reaction. So nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) Dissociation energy of its molecule is fairly high.

Nitrogen gas is very difficult to identify because of its :

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. High dissociation energy

  2. Characteristic colour

  3. Unreactive nature

  4. High electronegativity

Show answer
Correct Option: C
Explanation:

Nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) Due to its inert nature it does not react with other compounds. Hence, Nitrogen gas is very difficult to identify because of its nonreactive nature. 

Nitrogen is used for filling the electric bulbs, because it is: 

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. Lighter than air

  2. Capable of giving more light by the bulb

  3. Not helpful in burning

  4. Not poisonous

Show answer
Correct Option: C
Explanation:

You can't fill a bulb with air or combustion of hot tungsten wire at high temperature will take place in presence of oxygen. You can't maintain vacuum either or external atmospheric pressure will break the glass. So, you have to fill it with non-reactive gas like nitrogen.

The fixation of nitrogen can be brought artificially also.

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

The fixation of nitrogen can be brought artificially also by usage of Nitrogen Fertilizers.

As artificial fixation is possible, the given statement is true. 

Nitrogen gas turns moist blue litmus paper red.

chemistry nitrogen and sulfur nitrogen gas component of air - nitrogen nitrogen

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Nitrogen is a neutral gas hence, it does not show any change with Litmus and does not change the color of litmus paper.

Hence, the statement 'Nitrogen gas turns moist blue litmus paper red' is false.