Question

Choose the correct option
1. Which of these is true?
a. Carbon dioxide is not found in air.
b. Oxygen is a noble gas.
c. Nitrogen is the most naturally abundant gas.
d. Argon is the most naturally abundant gas.
2. Which of these is not an air pollutant?
a. Dust b. Smoke c. Oxygen d. Chemicals
3. Which of these gases is used in fire extinguisher?
a. Helium b. Oxygen c. Nitrogen d. Carbon dioxide
4. Which gas is used in food packaging?
a. Oxygen b. Carbon dioxide c. Hydrogen d. Nitrogen ​

Answer 1

Answer:

4 answer Nitrogen

2 answer is oxygen

Answer 2

(4) = the gas is found in food packaging is nitrogen

(1)= nitrogen is the most naturally abundant gas.

(3)= the gas found in fire extinguisher is carbon dioxide

(2)= oxygen is not an air pollutant