Chemistry

Chemistry of Gases and Applications

1,190 Questions

The chemistry of gases covers atmospheric composition, noble gases, and various applications of gas compounds in industrial and biological processes. Understanding the properties of common gases, their reactions, and environmental occurrences is vital for general science sections. Use these questions to practice identifying gases and their specific uses.

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Chemistry of Gases and Applications Questions

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

In the absence of catalyst, ammonia is burnt in an atmosphere of oxygen and produces :

  1. nitogen gas and water

  2. nitric oxide

  3. nitrogen dioxide

  4. nitric acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The combustion of ammonia proceeds to yield nitogen gas and water. With the use of catalyst and under correct conditions of temperature, ammonia reacts with oxygen to produce nitric oxide which is oxidized to nitrogen dioxide and is used in the synthesis of nitric acid.

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

A gas which is colourless, soluble in water and gives white fumes with $HCl$ is :

  1. nitrogen

  2. chlorine

  3. ammonia

  4. argon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ammonia is a colourless gas and is highly soluble in water. 

It is alkaline in nature turning red litmus blue.
The reaction of ${ NH } _{ 3 }$with $HCl$ ;
${ NH } _{ 3 }\quad +\quad HCl\quad \rightarrow \quad N{ H } _{ 4 }Cl\quad $
We get the white fumes of ammonium chloride.

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

Which of the following substance cannot be decomposed chemically?

  1. Ammonia

  2. Tellurium

  3. Methane

  4. Water

  5. Lunch
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tellurium $Te$ is an element which can not be further decomposed. Elements are chemically the simplest substances and hence, cannot be broken down using chemical methods. But Ammonia, methane and water are compounds that can be decomposed further into their elements. Lunch is mixture of compounds that can also be decomposed chemically.  

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

Ammonia gas cannot be dried by passing through :

  1. $conc.{ H } _{ 2 }S{ O } _{ 4 }$
  2. anhydrous $CaO$
  3. ${ P } _{ 2 }{ O } _{ 5 }$
  4. $CuS{ O } _{ 4 }$
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Because ammonia and water will form some amount of ammonium hydroxide, $N{ H } _{ 4 }OH$. The hydroxide will react with the acid ${ H }^{ + }$ ions from the acid and forms water. Addition of an acid to even a mild base like $N{ H } _{ 4 }OH$ is counter-productive to drying.

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

Ammonia acts as a :

  1. reducing agent

  2. oxidising agent

  3. bleaching agent

  4. both A and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ammonia is a strong reducing agent. It dissolves alkali metals and other electropositive metals such as Mg,Ca,Sr,Ba etc. At low concentration deep blue solutions are formed these contain metal cations and solvated electrons.
${ Li }^{ + }+{ e }^{ - }\rightleftharpoons Li\ { Na }^{ + }+{ e }^{ - }\rightleftharpoons Na$

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

What is the action of the sodium metal on ammonia?

  1. Ammonia gas is released

  2. Hydrogen gas is released

  3. Oxygen gas is released

  4. Nitrogen gas id released
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Sodium in ammonia can react in two way:
 1. in the absence of iron (III) catalyst:
the sodium metal gets dissolved in liquid ammonia. The result is a blue solution due to solvated electrons. This is the basis of the Birch Reduction reaction in the presence of alcohol.
2. In the presence of a bit of iron (III) catalyst:
Ammonia gas reacts with sodium metal to form sodium amide ($NaNH _2$) and hydrogen gas. The chemical reaction is as:
$2NH _3+2Na \rightarrow 2NaNH _2+H _2$
in the presence of a bit of an iron(III) catalyst, otherwise its a blue solution only.
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

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.