Question

4. Multiple Choice Questions (MCQs) : 1. Which one of the following gases has the highest concentration in the air? a. Ozone b. Carbon Dioxide Oc. Oxygen d. Nitrogen 2. Which one of the following is the greenhouse effect? a. Ozone layer in the atmosphere b. Air on the earth c. Global Warming d. None of these 3. Which layer of the atmosphere is the most ideal for flying aeroplanes? a. Troposphere O b. Stratosphere c. Mesosphere d. Thermosphere 4. Which one of the following gases has the highest concentration in the air? a. Carbon Dioxide b. oxygen c. Argon d. Ozone In which of the following layers the human beings live? a. Stratosphere O b. Mesosphere c. Troposphere d. Ionosphere 5.​

Answer 1

Answer:

nitrogen -78%

Global warming

STRATOSPHERE

oxygen

TROPOSPHERE