Question

Which of the following is Not a green house gas?

• A. NO₂
• B. CFC
• C. CO₂
• D. O₂

Answer 1

The Correct Option is D

Greenhouse gases are those that can trap heat in the Earth's atmosphere and contribute to the greenhouse effect. These gases include:
\( \text{NO}_2 \) (Nitrogen dioxide)
CFC (Chlorofluorocarbons)
\( \text{CO}_2 \) (Carbon dioxide) However, \( \text{O}_2 \) (Oxygen) is not considered a greenhouse gas because it does not have the ability to trap heat in the atmosphere. While it is essential for life on Earth, it does not absorb and emit infrared radiation in the way greenhouse gases do. Thus, the correct answer is \( \text{O}_2 \), which is not a greenhouse gas.

The correct option is(D): \(O_2\)

Answer 2

Oxygen (O$_2$) is not considered a greenhouse gas because it does not trap heat in the atmosphere like gases such as CO$_2$ and CFCs do. Greenhouse gases absorb and emit infrared radiation, which contributes to the greenhouse effect. Although O$_2$ is a vital component of the atmosphere, it does not contribute significantly to the trapping of heat.

Therefore, it is not classified as a greenhouse gas.