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.

Atmospheric gasesNoble gasesGas applicationsChemical compounds

Chemistry of Gases and Applications Questions

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Sewer gas is a complex mixture of:

  1. toxic and nontoxic gases

  2. toxic gases

  3. nontoxic gases

  4. inert gases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sewer gas is a complex mixture of toxic and nontoxic gases produced and collected in sewage systems by the decomposition of organic household or industrial wastes, typical components of sewage. Sewer gases may include hydrogen sulfide, ammonia, methane, esters, carbon monoxide, sulfur dioxide and nitrogen oxides.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

The gas that shows the most variation from place to place and from time to time in the lower atmosphere ___________

  1. Ozone ($\displaystyle { O } _{ 3 }$)
  2. Carbon dioxide ($\displaystyle { CO } _{ 2 }$)
  3. Water vapor ($\displaystyle { H } _{ 2 }O$)
  4. Argon ($\displaystyle Ar$)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The layer of the atmosphere closest to the earth is the troposphere also known as the lower atmosphere fixed composition of various constituents of air namely the carbon dioxide, nitrogen, ozone, rare gases etc, but the amount of water vapour varies from place to place and from time to time.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Atmospheric composition is 

  1. Argon

  2. Helium

  3. Iron

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An envelope of gas that surrounds earth is called atmosphere. It contains 78% nitrogen, 21% oxygen, 0.03% carbon dioxide, 0.9% argon and traces of other gases like helium, little amount of water vapour, dust particles and other solid particles. So, the correct option is D. 

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Which one disappeared from earlier atmosphere during its conversion to prime atmosphere?

  1. Atomic state of gases

  2. Oxygen

  3. Ammonia

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As the Earth cooled and the atmosphere evolved, atomic gases (which were unstable) and free oxygen (which was highly reactive) were largely absent or consumed in chemical reactions. Both are considered to have been absent or disappeared during the transition.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Which among the following alkane has largely replaced the ozone layer-depleting halomethanes in household refrigerators and freezers?

  1. Methane

  2. Propane

  3. Butane

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

Butane and other hydrocarbons like isobutane are commonly used as eco-friendly alternatives to CFCs in modern refrigeration systems because they have zero ozone depletion potential.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

The common refrigerant chlorofluoromethane (freon) and NO$ _x$ is a serious pollutant because

  1. It destroys haemoglobin
  2. It disrupts O$ _3$ layer

  3. It lowers atmospheric temperature

  4. It prevents cloud condensation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorofluorocarbons (Freons) release chlorine radicals in the stratosphere, which react with and destroy ozone (O3) molecules, leading to the depletion of the ozone layer.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

An ozone depleting chemical, which is used in fire- extinguishers is ________.

  1. Nitrogen oxide

  2. Methyl bromide

  3. Halon

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

Methyl bromide, halon, nitrogen oxides and chlorofluorocarbons are the potent ozone-depleting substances. These accumulate in the stratosphere and undergo photodissociation when exposed to the UV rays. The reactive chlorine and bromine react with ozone to form diatomic oxygen and molecular oxygen.

A. Nitrogen oxides are released from the vehicular exhausts and industrial emissions.
B. Methyl bromide was used as a fumigant.
C. Halon was used as fire-extinguisher.
D. Chlorofluorocarbons were used as refrigerants.
Hence, the correct answer is 'Halon'.

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 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 $NH _3$.