Tag: compounds of nitrogen - ammonia

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Questions Related to compounds of nitrogen - ammonia

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

Compound which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride?

  1. Chlorine

  2. Lead carbonate

  3. Ammonium sulphate

  4. Iron [II] sulphate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ammonium sulphate is the compound formed which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride.

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

Give a balanced reaction in which ammonia is oxidised by a metal oxide.

  1. ${ 4NH } _{ 3 }+3CuO\rightarrow 2{ N } _{ 2 }+{ 3H } _{ 2 }O+3Cu$
  2. ${ 2NH } _{ 3 }+4CuO\rightarrow { N } _{ 2 }+{ 3H } _{ 2 }O+4Cu$
  3. ${ 2NH } _{ 3 }+CuO\rightarrow { N } _{ 2 }+{ 3H } _{ 2 }O+Cu$
  4. ${ 2NH } _{ 3 }+3CuO\rightarrow { N } _{ 2 }+{ 3H } _{ 2 }O+3Cu$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

${ 2NH } _{ 3 }+3CuO\rightarrow { N } _{ 2 }+{ 3H } _{ 2 }O+3Cu$

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

Which of the following does not react with $AgCl$?

  1. $Na _{2}S _{2}O _{3}$
  2. $NH _{4}OH$
  3. $NaNO _{3}$
  4. $NH _{3}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

$AgCl+2NH _{4}OH\rightarrow \left [ Ag(NH _{3}) _{2} \right ]Cl+2H _{2}O$
$AgCl+2Na _{2}S _{2}O _{3}\rightarrow NaCl+Na _{3}\left [ Ag(S _{2}O _{3}) _{2} \right ]$
$AgCl+NH _{3}\rightarrow \left [ Ag(NH _{3}) _{2} \right ]Cl$
So, only $NaNO _{3}$ does not react with AgCl.

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

The bottles of liquid ammonia are opened after cooling them in ice for sometime. It is because liquid ammonia :

  1. has high vapour pressure at room temperature

  2. is corrosive liquid

  3. is an explosive

  4. brings tears in eyes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Liquid ammonia has hydrogen bonding which results in high vapour pressure at room temperature.


The vapour pressure of ammonia at room temperature is very high and hence the ammonia will evaporate unless the vapour pressure is decreased. 

Cooling decreases the vapour pressure so that the liquid remains in the same state. Hence, the bottle is cooled before opening.

Option A is correct.

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

Which of the following would lose weight when exposed to the atmosphere?

  1. Concentrated ${H} _{2}{SO} _{4}$
  2. Anhydrous ${Na} _{2}{CO} _{3}$
  3. Solid $NaOH$

  4. A saturated solution of ammonia in water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

${ NH } _{ 3 }$ is highly soluble in water.

Solution of ammonia in water is called liquor ammonia.
Liquor ammonia is highly volatile in nature and has a high latent heat of evaporation.
Hence, it will lose weight when exposed to atmosphere.

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

Liquid ammonia is a fuel for:

  1. motorcar

  2. aeroplane

  3. monorial

  4. rocket
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hydrogen is good fuel. $1$ mole of ammonia has more hydrogen than hydrogen fuel. It burns to give water and nitrogen. 

$NH _3$ is used as a fuel in rockets due to its high energy density.

It is a carbon-free fuel which is combined with liquid oxygen in rockets fuel tanks.

Another advantage is that due to its strong, pungent odour, they can be easily identified in case of fuel leakage.

Hence, option D is correct.
Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

The ion or group detected by $K _2[HgI _4]$ is:

  1. NO
  2. $Cl^-$
  3. $NH^{-2}$
  4. $NH _3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

${ K } _{ 2 }[Hg{ I } _{ 4 }]$ ( potassium mercuric iodide) is known as nesseler's reagent.

It is used for the detection of ammonia.
The reaction taking place is:
$2{ K } _{ 2 }[Hg{ I } _{ 4 }]+3KOH+{ NH } _{ 3 }\rightarrow [{ OHg } _{ 2 }.{ NH } _{ 2 }]I+7KI+2{ H } _{ 2 }O$
The colour of nesseler's reagent changes to brown in basic medium.

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

When $Na$ reacts with liquid $NH _3$ the following substance is formed: 

  1. $[Na(NH _3) _x]^- $
  2. $ [e(NH _3 ) _y]^-$
  3. $NaNH _2$
  4. $Na _xNH _{3y}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sodium (Na) dissolves in liquid ammonia ($NH _3$) solution to form a blue colored solution characteristic of a solvated electron in liquid ammonia which is conducting in nature due to presence of solvated electrons.

Reaction is  $ Na + (x+y)NH _3\rightarrow Na(NH _3) _x + (e(NH _3) _y)^-$
So B is correct answer.