Tag: nitrogen gas

Questions Related to nitrogen gas

The mixture of $CO$ and $N _2$ is called as :

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

  1. Water gas

  2. Producer gas

  3. Synthetic gas

  4. Marsh gas

Show answer
Correct Option: B
Explanation:

Water gas is a synthesis gas, containing carbon monoxide and hydrogen. It is a useful product but requires careful handling due to its flammability and the risk of carbon monoxide poisoning. 
Producer gas: a gas composed of carbon monoxide, hydrogen, and nitrogen, obtained by passing air and steam through incandescent coke.
Syngas/synthesis gas, is a fuel gas mixture consisting primarily of hydrogen, carbon monoxide, and very often some carbon dioxide.
Marsh gas is methane $CH _4$.

Nitrogen molecule is chemically less active because of its :

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

  1. small atomic energy.

  2. high dissociation energy.

  3. high electronegativity.

  4. stable electronic configuration.

Show answer
Correct Option: B
Explanation:
Nitrogen molecule is chemically less active because of its high dissociation energy. Nitrogen molecule contains triple bond between two atoms which is very strong and requires high energy for splitting the two nitrogen atoms of a molecule. 


On heating a mixture of $NH _{4}Cl$ and $KNO _{2}$, we get:

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $NH _{4}NO _{3}$

  2. $KNH _{4}(NO _{3}) _{2}$

  3. $N _{2}$

  4. $NO$

Show answer
Correct Option: C
Explanation:

On heating mixture of $NH _4Cl$ and $KNO _2$, $N _2$ is obtained with potassium chloride and water.

$NH _4Cl+KNO _2\longrightarrow N _2+KCl+2H _2O$

On heating ammonium dichromate and barium azide separately we get:

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $N _{2}$ in both cases

  2. $N _{2}$ with ammonium dichromate and $NO$ with barium azide

  3. $N _{2}O$ with ammonium dichromate and $N _{2}$ with barium azide

  4. $N _{2}O$ with ammonium dichromate and $NO _{2}$ with barium azide

Show answer
Correct Option: A
Explanation:

On heating ammonium dichromate and barium azide separately we get $N _2$ in both cases.

$(NH _4) _2Cr _2O _7 \rightarrow Cr _2O _3 + 4H _2O +N _2$.

$Ba(N _3) _2 \rightarrow Ba + 3N _2$.

Hence option A is correct.

Concentrated nitric acid on reacting with any metal like copper releases gas with an irritating odour :

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $H _2 S$

  2. $CuS$

  3. $H _2$

  4. $NO _2$

Show answer
Correct Option: D
Explanation:

Nitrogen dioxide is the chemical compound with the formula $NO _2$. It is one of several nitrogen oxides. $NO _2$ is an intermediate in the industrial synthesis of nitric acid, millions of tons of which are produced each year. This reddish-brown toxic gas has a characteristic sharp, biting odor and is a prominent air pollutant. Reduction of concentrated nitric acid by metal (such as copper).
$4 HNO _3 +Cu \rightarrow Cu(NO _3) _2+ 2 NO _2 + 2 H _2O$

Nitrogen is liberated by the thermal decomposition of :

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $NH _4NO _2$

  2. $NaN _3$

  3. $(NH _4) _2Cr _2O _7$

  4. All of these

Show answer
Correct Option: D
Explanation:

$ { { (NH } _{ 2 }) } _{ 2 }{ Cr } _{ 2 }{ O } _{ 7 }\xrightarrow [ thermal\quad decomposition ]{ \Delta  } { Cr } _{ 2 }{ O } _{ 3 }+{ N } _{ 2 }+4{ H } _{ 2 }O\ N{ H } _{ 4 }{ NO } _{ 2 }\xrightarrow [ thermal\quad decomposition ]{ \Delta  } { N } _{ 2 }+2{ H } _{ 2 }O\ 2{ NaN } _{ 3 }\xrightarrow [ thermal\quad decomposition ]{ \Delta  } 2Na+3{ N } _{ 2 } $

Hence, all of these. 

Out of the following which does not liberate $N _2$ gas on heating?

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $NaNO _2+NH _4Cl$

  2. $Ba(N _3) _2$

  3. $O _3+NO$

  4. $(NH _4) _2Cr _2O _7$

Show answer
Correct Option: C
Explanation:

A. $NaNO _2+NH _4Cl\longrightarrow N _2+2H _2O+NaCl$

B. $Ba(N _3) _2\longrightarrow Ba+3N _2$
C. $O _3+NO\longrightarrow NO _2+O _2$
D. $(NH _4) _2Cr _2O _7 \longrightarrow N _2+Cr _2O _3+4H _2O$
Hence, answer is $O _3+NO$..

Among the following compounds, which on heating do not produce ${ N } _{ 2 }$?

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. ${ \left( { NH } _{ 4 } \right) } _{ 2 }{ Cr } _{ 2 }{ O } _{ 7 }$

  2. ${ NH } _{ 4 }CI+Na{ NO } _{ 2 }$

  3. ${ NH } _{ 4 }CI+CaO$

  4. $Ba{ \left( { N } _{ 3 } \right) } _{ 2 }$

Show answer
Correct Option: C
Explanation:

The reaction is given by,

$2 NH _4Cl + CaO → 2 NH _3 + CaCl _2 + H _2O$

20 ml of mixture of $N _{2}$ and $CH _{4}$ was exploded with excess of air. There is contraction of 5 ml in volume after treatment with KOH solution, what is the percentage of $N _{2}$ in the mixture?($N _{2}$ is inert)

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. $25%$

  2. $50%$

  3. $87.5%$

  4. $80%$

Show answer
Correct Option: C

Which of the following compound does not liberate nitrogen with $HNO _{2}$?

chemistry preparation of gases nitrogen gas component of air - nitrogen nitrogen

  1. Carbamide

  2. Primary amine

  3. Secondary amine

  4. Alkanamide

Show answer
Correct Option: C
Explanation:

Secondary amines do not read with $HNO _2$ to produce $H _2.$

$\Rightarrow R _2NH+H-O-N=0\rightarrow R _2N-N=0+H _2O$
Hence, the answer is secondary amines.