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 various types of barometer fluids physics

Most commonly known barometric fluid is

  1. Mercury

  2. Liquid oxygen

  3. Nitrogen

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

The first reason to use mercury is its high density. The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by $h\rho g$.

Due to high value of $\rho$ the same pressure can be measured for smaller value of $h$.
Also the vapor pressure of mercury is negligible, due to which the barometric height is not affected.

Multiple choice chemistry water drying and dehydrating agents hydrolysis of salts and the ph of their solutions chemical equilibrium and acids-bases

Which of the following salts on heating gives a mixture of two gases?

  1. $Ba(NO _3) _2$
  2. $NaNO _3$
  3. $KNO _3$
  4. $RbNO _3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$(A)$  $Ba(NO _3) _2$


$Reason$ :  The elements in the group 2 includes beryllium($Be$), magnesium($Mg$), calcium($Ca$), strontium($Sr$), barium($Ba$) and radium($Ra$).
The group 2 nitrates, on heating, gives metal oxide, nitrogen dioxide and oxygen gas.
For example - $2Ba(NO _3) _2(s)$ $\rightarrow$ $2BaO(s)$ + $4NO _2(g)$ + $O _2(g)$
Group 2 nitrates also become more thermally stable down the group. 

Multiple choice botany photosynthesis modern concept of photosynthesis photosystems photosynthesis in higher plants

Photolysis of water releases ........... gas.

  1. ${ CO } _{ 2 }$
  2. ${ O } _{ 2 }$
  3. ${ NH } _{ 3 }$
  4. ${ CH } _{ 3 }$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Photolysis, the chemical process by which molecules are broken down into smaller units through the absorption of light.

Photolysis of water is the process by which water is split into H+, oxygen, and electrons in the presence of light.
So the answer is 'O2'. 

Multiple choice chemistry petrochemicals and polymers petroleum properties of alkanes petroleum and natural gas rocks and minerals

Producer gas is a mixture of:

  1. $CO\, and\, H _2$
  2. $CO\, and\, N _2$
  3. $SO _2\, and\, H _2$

  4. none of the above
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation
Producer gas is a mixture of flammable gases and non-flammable gases. Flammable gases are carbon monoxide and hydrogen. Non-flammable gases are mainly nitrogen and carbon dioxide.
Producer gas has lower heating value than the other gaseous fuels. It is used mainly as a fuel in large industrial furnace.

Multiple choice chemistry petrochemicals and polymers petroleum properties of alkanes petroleum and natural gas rocks and minerals

Petroleum gas mainly consists of:

  1. methene, ethene, propane and butene.

  2. methane, ethane, propane and hexane.

  3. methane, ethane, propane and butane.

  4. methane and butane.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Liquefied Petroleum Gas or LPG (also called Autogas) consists mainly of propane, propylene, butane, and butylene in various mixtures.It is produced as a by-product of natural gas processing and petroleum refining. The components of LPG are gases and will evaporate at normal temperatures and pressures, as a result it is stored in pressurised steel bottles.  Unlike natural gas, LPG is heavier than air, and thus will flow along floors and tend to settle in low spots, such as basements.Such accumulations can cause explosion hazards.

Multiple choice economics environmental economics acid rain air pollution - effects and control air pollution and its effects

Dissolved gas present in acid rain is

  1. Hydrogen chloride

  2. Nitrogen oxide

  3. Sulphur dioxide

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the given gases are present in acid rain. Many gases from the industrial effluents and burning of fuels in automobiles led to the release of these harmful gases in the air. These get mixed with rain and form the harmful acid rain.

So, option D is the correct answer.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

In ammonia, nitrogen and hydrogen always combine in $14:3$ ratio by mass. This is in agreement with :

  1. Law of conservation of mass

  2. Law of definite proportion

  3. Law of multiple proportion

  4. Law of combining volume
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Law of definite proportion states that elements always combine in the definite ratio by mass. So it is in agreement with the law of definite proportion.