Question:
Which of the following gases causes greenhouse effect?
Which of the following gases causes greenhouse effect?
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Remember that greenhouse gases are those which can absorb and emit infrared radiation, leading to heat trapping in the atmosphere. Common examples include carbon dioxide, methane, and water vapor.
Updated On: Jun 3, 2026
- $\text{CO}_2$
- $\text{N}_2$
- $\text{O}_2$
- Ar
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The Correct Option is A
Solution and Explanation
Step 1: Concept
The greenhouse effect is a process by which gases in the atmosphere trap heat from the sun, leading to warming of Earth's surface. Certain gases are more effective at trapping this heat than others.
Step 2: Meaning
Gases that cause the greenhouse effect are known as greenhouse gases. They absorb and emit infrared radiation, thus enhancing the natural insulation provided by the atmosphere.
Step 3: Analysis
To determine which gas causes the greenhouse effect among the given options, we need to consider their ability to absorb infrared radiation: $\text{CO}_2$ (carbon dioxide) is a potent greenhouse gas because it absorbs infrared radiation strongly. It plays a significant role in enhancing the Earth's temperature by trapping heat. $\text{N}_2$ (nitrogen) and $\text{O}_2$ (oxygen) are not greenhouse gases as they do not significantly absorb infrared radiation. They make up most of the atmosphere but do not contribute to the greenhouse effect. Ar (argon) is a noble gas that does not strongly interact with infrared radiation, making it an insignificant contributor to the greenhouse effect. Therefore, among the given options, only $\text{CO}_2$ effectively causes the greenhouse effect by absorbing and re-emitting infrared radiation.
Step 4: Conclusion
$\text{CO}_2$ is the correct answer as it is a major greenhouse gas responsible for enhancing the Earth's temperature through the greenhouse effect.
Final Answer: (A)
The greenhouse effect is a process by which gases in the atmosphere trap heat from the sun, leading to warming of Earth's surface. Certain gases are more effective at trapping this heat than others.
Step 2: Meaning
Gases that cause the greenhouse effect are known as greenhouse gases. They absorb and emit infrared radiation, thus enhancing the natural insulation provided by the atmosphere.
Step 3: Analysis
To determine which gas causes the greenhouse effect among the given options, we need to consider their ability to absorb infrared radiation: $\text{CO}_2$ (carbon dioxide) is a potent greenhouse gas because it absorbs infrared radiation strongly. It plays a significant role in enhancing the Earth's temperature by trapping heat. $\text{N}_2$ (nitrogen) and $\text{O}_2$ (oxygen) are not greenhouse gases as they do not significantly absorb infrared radiation. They make up most of the atmosphere but do not contribute to the greenhouse effect. Ar (argon) is a noble gas that does not strongly interact with infrared radiation, making it an insignificant contributor to the greenhouse effect. Therefore, among the given options, only $\text{CO}_2$ effectively causes the greenhouse effect by absorbing and re-emitting infrared radiation.
Step 4: Conclusion
$\text{CO}_2$ is the correct answer as it is a major greenhouse gas responsible for enhancing the Earth's temperature through the greenhouse effect.
Final Answer: (A)
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