Tag: nitrogen and sulfur

Questions Related to nitrogen and sulfur

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

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

  1. ${ OH }^{ - }$

  2. ${ H _3O }^{ + }$

  3. ${ H }^{ +}$

  4. ${ O }^{ -2 }$

Show answer
Correct Option: A
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 }^{ - }$

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

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

  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

Show answer
Correct Option: C
Explanation:

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

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

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

  1. Chlorine

  2. Lead carbonate

  3. Ammonium sulphate

  4. Iron [II] sulphate

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Correct Option: C
Explanation:

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

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

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

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

Show answer
Correct Option: D
Explanation:

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

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

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

  1. $Na _{2}S _{2}O _{3}$

  2. $NH _{4}OH$

  3. $NaNO _{3}$

  4. $NH _{3}$

Show answer
Correct Option: C
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.

Ammonia on reaction with hypochlorite anion forms :

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

  1. $\mathrm{N}\mathrm{O}$

  2. $\mathrm{N}\mathrm{H} _4Cl$

  3. $\mathrm{N} _{2}\mathrm{H} _{4}$

  4. $\mathrm{H}\mathrm{N}\mathrm{O} _{2}$

Show answer
Correct Option: C
Explanation:

$2NH _{3} + OCl^{-} \rightarrow N _{2}H _{4} + Cl^{-} + H _{2}O$

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

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

  1. has high vapour pressure at room temperature

  2. is corrosive liquid

  3. is an explosive

  4. brings tears in eyes

Show answer
Correct Option: A
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.

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

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

  1. Concentrated ${H} _{2}{SO} _{4}$

  2. Anhydrous ${Na} _{2}{CO} _{3}$

  3. Solid $NaOH$

  4. A saturated solution of ammonia in water

Show answer
Correct Option: D
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.

Liquid ammonia is a fuel for:

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

  1. motorcar

  2. aeroplane

  3. monorial

  4. rocket

Show answer
Correct Option: D
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.

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

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

  1. NO

  2. $Cl^-$

  3. $NH^{-2}$

  4. $NH _3$

Show answer
Correct Option: D
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.