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 zoology respiratory system of human mechanism of respiration respiratory cycle breathing and exchange of gas

The gas which we breath out precipitates ______ into milky white.

  1. Sodium Chloride solution

  2. Calcium Carbonate solution

  3. Potassium Permanganate solution

  4. Potassium Bicarbonate solution
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The gas which we exhale or breath out is carbon-dioxide. 

When this gas passes through calcium carbonate solution there occurs precipitation reaction between the solution, as a result, the color of the solution turns to milky white.
When CO$ _2$ is passed through lime water which is a diluted solution of Ca(OH)_2, it turns milky due to the formation of calcium carbonate $CaCO _3$.

So the option B is correct.

Multiple choice real gases van der-waal equation: equation of state for real gas kinetic theory of gases thermal physics physics

In the year 1984, the Bhopal gas tragedy was caused by the leakage of

  1. Carbon monoxide

  2. Methyl isocyanate

  3. Nitrogen oxide

  4. Sulphur oxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Bhopal gas tragedy was an industrial catastrophe that occurred in 1984 at the Methyl isocynate gas ($CH _3NCO$) was leaked from the plant. Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Which of the following gases related with acid rain?

  1. ${ NO } _{ 2 }$ and ${ CO } _{ 2 }$
  2. ${ CH } _{ 4 }$ and ${ SO } _{ 2 }$
  3. ${ CO } _{ 2 }$ and ${ SO } _{ 2 }$
  4. ${ SO } _{ 2 }$ and ${ NO } _{ 2 }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

${ SO } _{ 2 }$ and ${ NO } _{ 2 }$:burning of fossil fuels releases oxides of sulphur and nitrogen, ${ SO } _{ 2 }$ and ${ NO } _{ 2 }$ reacts with water and oxygen and other chemicals to form sulphuric acid and nitric acid.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

In the gases below, which would react with rain water to produce acid rain?
i. CFCs
ii. Methane
iii. Carbon dioxide

  1. i only

  2. ii only

  3. iii only

  4. i and iii only

  5. i, ii and iii
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide would react with rainwater to produce acid rain.


The reaction of carbon dioxide with water gives carbonic acid.

$\displaystyle CO _2 + H _2O \rightarrow H _2CO _3 $

  • Hence the correct option is C.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Which of the following statements is not true?

  1. Ammonia acts as sink for $NO _{x}$.
  2. Limestone acts as sink for $SO _{x}$

  3. The average residence time of NO is one month.
  4. $SO _{x}$ can be removed from flue gases by passing through a solution of citrate ions.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Residence time means the lifetime amount of chemicals in the atmosphere divided by the rate at which the chemicals are eliminated from the atmosphere. The average residence time of NO is 0.5 to 2 days. 

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

Which one of the following is basic oxide?

  1. Nitrous oxide

  2. Nitric oxide

  3. Carbon monoxide

  4. Zinc oxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Metals generally form basic  oxides, some of which are also amphoteric, such as aluminium  oxide, zinc oxide, lead oxide etc.
Non-metals generally form acidic oxides. Some oxides are neutral, such as nitrous oxide, nitric oxide, carbon monoxide water etc.
Multiple choice

Name the CFC that is used in refrigerator.

  1. Ammonia

  2. Freon

  3. Methane

  4. Carbondioxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Freon is a brand name for a group of chlorofluorocarbons (CFCs) that were historically used as refrigerants in refrigerators and air conditioning units.

Multiple choice

Where was freon used in prior to the ban on CFS's?

  1. To make foam

  2. in air conditioners

  3. in nuclear power stations

  4. in television screen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Freon (CFCs) was widely used as a refrigerant in air conditioning systems for homes, cars, and commercial buildings before being phased out due to its ozone-depleting properties.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Methane gas has highest........... among all hydrocarbons.

  1. Ignition temperature

  2. Ratio of hydrogen to carbon

  3. Calorific value

  4. Both Band C are correct
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hydrogen has the highest calorific value of 150 kJ/g. Among the hydrocarbon, methane has the highest calorific value of 55 kJ/g.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

A homogenous mixture of two gases is :

  1. Brass

  2. Graphite

  3. Air

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

The air that we breathe is a homogeneous mixture of oxygen, nitrogen, argon, and carbon dioxide, along with other elements in smaller amounts. Because each layer of the Earths atmosphere has a different density, each layer of air is its own homogeneous mixture.

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

The mixture of gases used by deep-sea divers is helium-oxygen.

  1. True

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

The main reason for adding helium to the breathing mixture is to reduce the proportions of nitrogen and oxygen below those of air, to allow the gas mixture to be breathed safely on deep dives. A lower proportion of nitrogen is required to reduce nitrogen narcosis and other physiological effects of the gas at depth.

Multiple choice chemistry coordination chemistry werner's theory werner's theory of coordination compounds coordination compounds

How many of the following metals when heated in an atmosphere of N2 gas form nitrides ?
Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba

  1. 9

  2. 5

  3. 3

  4. 6
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lithium (Li) and the alkaline earth metals (Mg, Ca, Sr, Ba) form nitrides when heated in nitrogen gas. Na, K, Rb, and Cs do not form stable nitrides under these conditions.