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

The refrigerant commonly used for domestic refrigerators is

  1. ammonia

  2. nitrogen

  3. ammonia nitrate

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

Ammonia (R-717) is a common refrigerant used in industrial and large-scale cooling systems. While modern domestic refrigerators often use HFCs or hydrocarbons, ammonia is historically and technically significant as a refrigerant.

Multiple choice

Nobel gases are also called

  1. good gases

  2. rare gases

  3. highly reactive

  4. explosive gases

  5. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nobel gases are also called as rare gases. A noble gas is an element with its outer electron shell completely filled. He, Ne, Ar, Kr, Xe, and Rn all have their outer p orbitals filled thus making them either totally or very unreactive. They are sometimes referred to as the inert gases too.

Multiple choice

Air contains about 78 percent of

  1. hydrogen

  2. nitrogen

  3. oxygen

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

Earth's atmosphere is composed primarily of nitrogen, which makes up approximately 78 percent of the air by volume. Oxygen accounts for about 21 percent, while other gases make up the remainder.