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

Lavoisier called Carbon dioxide as

  1. Vitiated air

  2. Chalky acid gas

  3. Laughing gas

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

Antoine Lavoisier referred to carbon dioxide as 'chalky acid gas' during his early chemical investigations into respiration and combustion. Joseph Black had previously discovered it and called it 'fixed air'.

Multiple choice

The two main gases that humans breathe are oxygen and ___________.

  1. Nitrogen

  2. Helium

  3. Hydrogen

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

Earth's atmosphere is composed of about 78% nitrogen and 21% oxygen, making these the two primary gases we inhale with every breath. Although we only use the oxygen for respiration, nitrogen is the most abundant gas we breathe in and out.

Multiple choice

What gas makes up 78% of the air?

  1. Nitrogen

  2. Oxygen

  3. Carbon dioxide

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

Nitrogen is the most abundant gas in Earth's atmosphere, making up approximately 78% of dry air. Oxygen is the second most abundant at about 21%, while carbon dioxide and water vapor exist in much smaller amounts.

Multiple choice

Argon

  1. Ar

  2. An

  3. Ag

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

Argon is represented by the chemical symbol Ar. Ag is the symbol for silver, while An and A are not standard element symbols.

Multiple choice

Neon

  1. No

  2. N

  3. Na

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

Neon is represented by the chemical symbol Ne. N is the symbol for nitrogen, and Na is the symbol for sodium.

Multiple choice

NO3- is

  1. Nitrite

  2. Nitrate

  3. Ammonium ion

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The chemical formula NO3- represents the nitrate ion, which is a primary form of nitrogen absorbed by plants.

Multiple choice

Clostridium is

  1. Aerobic

  2. Anaerobic

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Clostridium is a genus of bacteria that are obligate anaerobes, meaning they function and fix nitrogen in the absence of oxygen.

Multiple choice

Nitrogen travels as

  1. Inorganic ions

  2. Organic form

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nitrogen is absorbed from the soil as inorganic ions (nitrate/ammonium) but is also transported within the plant in organic forms like amino acids and amides.

Multiple choice

Lichens are sensitive to

  1. NO2

  2. CO2

  3. SO2

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

Lichens are highly sensitive to sulfur dioxide (SO2) pollution. They are often used as bioindicators of air quality because they do not grow in areas with high levels of SO2.