Chemistry

Chemistry of Gases and Applications

1,175 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.

Atmospheric gasesNoble gasesGas applicationsChemical compounds

Chemistry of Gases and Applications Questions

Multiple choice chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Chlorine is greenish yellow gas.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is a pale green gas and is used in cleaning products. Chlorine is an greenish-yellow gaseous element. Its atomic number is 17, and is one of the class called halogens in the periodic table. Large concentration of chlorine are dangerous.

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

Which of the following metal on burining in mosist air does not give smell of ammonia?

  1. $Mg$
  2. $Ca$
  3. $K$
  4. $Li$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Magnesium, calcium, and lithium react with atmospheric nitrogen when burned to form nitrides (Mg3N2, Ca3N2, Li3N), which release ammonia upon hydrolysis with moisture. Potassium is highly reactive but does not form a stable nitride under these conditions, so it does not produce ammonia.

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

Which of the following gives nitrogen on thermal decomposition?

  1. Ammonium nitrite

  2. Ammonia

  3. Ammonium dichromate

  4. Air
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Nitrogen gas is obtained by thermal decomposition of ammonium nitrite, ammonia and ammonium dichromate.

Ammonium dichromate on heating yields nitrogen, water and chromium(III) oxide and ammonium nitrate on heating yields nitrogen gas and water.

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

Which of the following are correct statements?

  1. $NH _3$ can be used as a refrigerant
  2. NO is heavier than $O _2$
  3. Nitrogen diffuses fastre than $O _2$
  4. $NO _2$ is a colourless gas
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ammonia is amongst the oldest of all there frigerants and still used widely in the refrigeration applications. It is also the only refrigerant outside the halo-carbons group, still being used to a great extent.Ammonia refrigerant is commonly known as R717 and its chemical formula is $NH _3$.

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.