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

Which is an example of a gas?

  1. Helium

  2. Carbon Dioxide

  3. Oxygen

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

Gases are substances that have no fixed shape or volume. Helium, carbon dioxide, and oxygen are all common examples of gases.

Multiple choice

Carbon dioxide is an example of what?

  1. Gas

  2. Liquid

  3. Solid

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

Carbon dioxide is a chemical compound that exists as a gas at room temperature and standard atmospheric pressure. It is not a liquid, solid, or plasma under these common conditions.

Multiple choice methane study of methane carbon- an important element hydrocarbons chemistry
At room temperature and standard pressure, methane is a colorless, odourless gas.

  1. True

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

The given statement is True.
At room temperature and standard pressure, methane is a colorless, odorless gas.
First four members are colourless, odourless gases, pentane to heptadecane are colourless, odourless liquids, while higher alkanes are colourless solids.

Multiple choice methane study of methane carbon- an important element hydrocarbons chemistry

When vegetable matter decays at the bottom of lakes and ponds where there is limited air, it gives rise to 'marsh gas', which is:

  1. oxygen

  2. chlorine

  3. butane

  4. methane
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
(i) Marsh gas is a mixture of methane, hydrogen sulfide and carbon dioxide which has methane at high percentage compared to the other two compounds.
(ii) Marsh gas is produced naturally in flooded regions.
(iii) This condition allows anaerobic digestion and fermentation of organic matter which produces methane
Multiple choice methane study of methane carbon- an important element hydrocarbons chemistry

The correct composition of water gas is :

  1. mixture of $H _2$ and $CO$
  2. mixture of $N _2$ and $CO$
  3. mixture of $He$ and $CO$
  4. mixture of $O _2$ and $CO$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water gas is produced from synthesis gas, which is composed of carbon monoxide and hydrogen. Syngas is a useful product, but requires careful handling due to its flammability and the risk of carbon monoxide poisoning. 

Multiple choice acyl chlorides carboxylic acids and their derivatives functional derivatives of carboxylic acids carbonyl compounds chemistry

As the molecular weight increases the boiling point of carboxylic acid:

  1. increases

  2. decreases

  3. remain same

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As the molecular weight increases the boiling point of carboxylic acid increases. Lower aliphatic carboxylic acids (upto 9 C atoms) are liquids, the higher members are wax like solids.

Multiple choice action of alkalis on some metals and metal oxides analytical chemistry properties of acids and bases acids, bases and salts chemistry

Chromium hydroxide on reaction with excess $\displaystyle NaOH$ gives a soluble compound. Guess the molecular formula.

  1. $\displaystyle \left[ { Cr\left( OH \right) } _{ 3 } \right] $
  2. $\displaystyle { \left[ { Cr\left( OH \right) } _{ 4 } \right] }^{ - }$
  3. $\displaystyle { \left[ { Cr\left( OH \right) } _{ 5 } \right] }^{ 2- }$
  4. $\displaystyle { \left[ { Cr\left( OH \right) } _{ 6 } \right] }^{ 3- }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An excess of sodium hydroxide solution is added to a solution of the hexaaquachromium(III) ions to produce a solution of green hexahydroxochromate(III) ions.

$[Cr(H _2O) _6]^{3+} \xrightarrow{NaOH} [Cr(H _2O) _3(OH) _3] \xrightarrow{excess NaOH} [Cr(OH) _6]^{-3}$

Multiple choice chemistry study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

Hydrogen gas is manufactured by:

  1. Bosch's process

  2. Haber's process

  3. Ostwald process

  4. Birkeland-Eyde process
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Among the given option, the Bosch process is correct.

It is the commercial preparation of dihydrogen from water gas.
$C+{ H } _{ 2 }O\longrightarrow CO+{ H } _{ 2 }$
$CO+{ H } _{ 2 }O \xrightarrow { 773K }  { CO } _{ 2 }+{ H } _{ 2 }O$