Tag: ammonia

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Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Ammonia, $NH _3$ and hydrazine, $NH _2NH _2$, are two compounds of nitrogen, $N _2$. Which statement is correct?

  1. The N-N bond in $NH _2NH _2$ is polar
  2. $NH _3$ and $NH _2NH _2$ have lone pairs of electrons but $N _2$ does not
  3. The oxidation number of each nitrogen in $NH _2NH _2$ is $+2$

  4. The reaction of nitrogen with hydrogen has a high activation energy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solution:- (D) The reaction of nitrogen with hydrogen has high activation energy.


The $N-N$ bond in $N{H} _{2} N{H} _{2}$ is a non-polar bond because $N$ and $N$ have the same electronegativity value.

${N} _{2}$ also has a lone pair of electron on each nitrogen atom.

The oxidation number of each hydrogen in $N{H} _{2}N{H} _{2}$ is $+1$, thus the oxidation number of each nitrogen in $N{H} _{2}N{H} _{2}$ is $-2$.

Due to high bond energy, the reaction of nitrogen with hydrogen has high activation energy.

Hence statement $\left( D \right)$ is correct.

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Gases: ammonia, chlorine, hydrogen chloride and sulphur dioxide 

Select the gas that matches the description given.

Statement : The gas turns moist red litmus paper blue.

  1. Chlorine

  2. Ammonia

  3. Sulphur dioxide

  4. Hydrogen chloride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ammonia is basic in nature which turns red litmus paper to blue and confirms that ammonia is alkaline gas.

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Formation of ammonium sulphate from ammonia and dil sulphuric acid is given by :

  1. ${3NH } _{ 3 }+{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { \left(2 { NH } _{ 4 } \right) } _{ 2 }{ SO } _{ 4 }$
  2. ${ 2NH } _{ 3 }+{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { \left( { NH } _{ 4 } \right) } _{ 2 }{ SO } _{ 4 }$
  3. ${ 2NH } _{ 3 }+3{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { \left( { NH } _{ 4 } \right) } _{ 2 }{ SO } _{ 4 }$
  4. ${ 2NH } _{ 3 }+2{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { \left( { NH } _{ 4 } \right) } _{ 2 }{ SO } _{ 4 }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

${ 2NH } _{ 3 }+{ H } _{ 2 }{ SO } _{ 4 }\rightarrow { \left( { NH } _{ 4 } \right)  } _{ 2 }{ SO } _{ 4 }$

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

The two ions which are formed when ammonia dissolves in water are ammonium ion and ___________ .

  1. ${ OH }^{ - }$
  2. ${ H _3O }^{ + }$
  3. ${ H }^{ +}$
  4. ${ O }^{ -2 }$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ammonia readily dissolves in water with the liberation of heat. The ions which are formed are ammonium ion and hydroxyl ion. The aqueous solution of ammonia is ammonium hydroxide.
$ { NH } _{ 3 }+{ H } _{ 2 }O\rightleftharpoons { NH } _{ 4 }^{ + }+{ OH }^{ - }$

Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Give balanced equation for reaction in which $NH _3$ is oxidized by a gas which is not oxygen.

  1. $8{ NH } _{ 3 }+{ 3Cl } _{ 2 }\rightarrow 6{ NH } _{ 4 }Cl+2{ N } _{ 2 }$
  2. $4{ NH } _{ 3 }+{ 3Cl } _{ 2 }\rightarrow 3{ NH } _{ 4 }Cl+{ N } _{ 2 }$
  3. $8{ NH } _{ 3 }+{ 3Cl } _{ 2 }\rightarrow 6{ NH } _{ 4 }Cl+{ N } _{ 2 }$

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ammonia is oxidised by chlorine gas.
$8{ NH } _{ 3 }+{ 3Cl } _{ 2 }\rightarrow 6{ NH } _{ 4 }Cl+{ N } _{ 2 }$