Air -Multiple Choice Questions Quiz

Interactive MCQs on “Air”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: Which gases are the primary components of air?

(a) Nitrogen and oxygen
(b) Carbon dioxide and nitrogen
(c) Oxygen and carbon dioxide
(d) Oxygen and helium

Question 2: What is the approximate percentage of carbon dioxide in the Earth's atmosphere?

(a) 21%
(b) 0.04%
(c) 78%
(d) 1%

Question 3: Which gas is essential for respiration and is used by living organisms to release energy from food?

(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Hydrogen

Question 4: What is the role of nitrogen in the atmosphere?

(a) Supporting combustion
(b) Absorbing harmful ultraviolet radiation
(c) Regulating the Earth's temperature
(d) Providing the majority of air we breathe

Question 5: Which gas is primarily responsible for the greenhouse effect and contributes to global warming?

(a) Oxygen
(b) Nitrogen
(c) Carbon dioxide
(d) Helium

Question 6: What is the process called when plants absorb carbon dioxide and release oxygen during photosynthesis?

(a) Respiration
(b) Combustion
(c) Decomposition
(d) Photosynthesis

Question 7: Which layer of the Earth's atmosphere contains most of the air and weather phenomena?

(a) Stratosphere
(b) Troposphere
(c) Mesosphere
(d) Thermosphere

Question 8: What is the purpose of the ozone layer in the Earth's atmosphere?

(a) Absorbing harmful ultraviolet radiation
(b) Providing oxygen for breathing
(c) Facilitating precipitation
(d) Generating heat for the planet

Question 9: Which gas is commonly used in the welding industry due to its ability to react with oxygen to form a protective shield?

(a) Nitrogen
(b) Oxygen
(c) Hydrogen
(d) Argon

Question 10: What is the approximate percentage of water vapor in the Earth's atmosphere?

(a) 21%
(b) 0.04%
(c) 78%
(d) 1%