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 structure of the atom electronic configuration and valency electron configuration periodic trends in physical properties

The valency of nitrogen in nitrogen dioxide is:

  1. 1

  2. 2

  3. 3

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

$(D)$  $ 4$


$Sol. $  let the valency of nitrogen in be $ x$. 
           valency of oxygen = $ -2 $
          For $NO _2 $ it will be ,
                                $ x + 2 \times(-2) = 0 $
                                 $ x = +4 $
Hence, the valency of nitrogen in $ NO _2$ is $ +4 $. 

Multiple choice chemistry the periodic table periodic trends in chemical properties alkali metals study of specific groups

Which of the following exists as an individual gas-phase atom under standard conditions?

  1. $\displaystyle C$
  2. $\displaystyle N$
  3. $\displaystyle O$
  4. $\displaystyle F$
  5. $\displaystyle Ne$
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Option E is the correct answer.

${Ne} $ or Neon is an inert gas. It has a complete octet (2,8) with 8 electrons in its outermost orbit and is highly stable. And thus under standard conditions it remains as an individual gas phase atom without forming a molecule. 

Multiple choice chemistry the periodic table periodic trends in chemical properties alkali metals study of specific groups

Inert gases are otherwise called zero valent elements.
State whether the given statement is true or false.

  1. True

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

Given statement is true.
In general noble elements have a stable configuration that is octet configuration with all orbitals filled. Hence no tendency in either accepting or donating electrons. This is why those are called zero valent elements. 

Multiple choice chemistry the periodic table periodic trends in chemical properties alkali metals study of specific groups

All the naturally occurring noble gases are non-reactive except:

  1. Argon

  2. Helium

  3. Xenon

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

While noble gases are generally inert, Xenon is the most reactive among them due to its lower ionization energy, allowing it to form compounds with highly electronegative elements like fluorine and oxygen. Argon, Helium, and Radon are significantly less reactive under standard conditions.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy


Gases like ___, _, _____ and ______ are generated in a biogas plant.

  1. Methane ($CH _4$) , ($CO _2$), Hydrogen ($H _2$) and $H _2S$
  2. Sulphuric acid, ($CO _2$), Hydrogen ($H _2$) and $H _2S$
  3. Methane ($CH _4$), Oxygen, Hydrogen ($H _2$) and $H _2S$
  4. methane ($CH _4$), $CO _2$, Sulphuric acid and $H _2S$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gases in a biogas in decreasing proportion are methane, carbon dioxide, nitrogen, hydrogen, hydrogen sulphide.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Biogas is a mixture of

  1. $CO + H _2 + CH _4$
  2. $CO _2 + CH _4 + H _2 + H _2 S$
  3. $CO + H _2$
  4. $CO _2 + N _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas is primarily produced through the anaerobic digestion of organic matter. Its main components are methane (CH4) and carbon dioxide (CO2), with smaller amounts of hydrogen (H2) and hydrogen sulfide (H2S).

Multiple choice introduction to mole gas laws and mole concept atoms and molecules chemistry mole concept chemical formula and mole concept

Which of the following gas molecule has the longest mean free path at the same pressure and temperature?

  1. $H _2$
  2. $N _2$
  3. $O _2$
  4. $Cl _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mean free path is inversely proportional to the collision cross-section. Smaller molecules like H2 have a smaller cross-section, leading to a longer mean free path compared to larger molecules like N2, O2, or Cl2.

Multiple choice water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

The most problematic gases emitted in a volcanic eruption includes :

  1. sulphur dioxide

  2. carbon dioxide

  3. hydrogen fluoride

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

Volcanic eruptions release a variety of gases, including sulfur dioxide, carbon dioxide, and hydrogen fluoride, all of which pose environmental and health risks.

Multiple choice water and air and their importance natural resources- air, water and land air around us air chemistry

The component of air essential for growth of plants and animals is ________.

  1. oxygen

  2. nitrogen

  3. hydrogen

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

The component of air which is essential for growth of plants and animals is nitrogen. Atmospheric nitrogen is converted by bacteria through nitrogen fixation to nitrate and nitrites, which is consumed by plants. Animals also need nitrogen, as all amino acids which are the building blocks of proteins have basic element of nitrogen.