Set 3 | Important Greenhouse Effect and Climate Change MCQs

Important Greenhouse Effect and Climate Change MCQs. Greenhouse Effect and Climate Change plays a crucial role within the broader field of environment and ecology. It serves as a foundational concept for achieving success in competitive exams such as Civil Services, State exams, SSC, Railways, Banking, and more. Mastering these subjects offers a unique advantage, allowing you to gain invaluable insights into the country’s environmental legacy. With a focus on Environment, Biodiversity, and Ecology, this knowledge not only sharpens your competitive edge but also equips you to excel in these challenging exams.

MCQs on Greenhouse Effect and Climate Change – Objective Questions and Answers

Q21. Which of the following is known as ‘carbon negative country’ in the world? (U.P. Lower Sub. (Pre) 2015)

[A] Afghanistan

[B] Bahrain

[C] Bhutan

[D] Nepal

View Explanation

Correct Answer is C.

The world’s top carbon-negative country is Bhutan. This small Himalayan nation stands out for its environmental policies and commitment to sustainability.

Q22. Which one among the following substances does not contribute to global warming directly ? (U.P.P.C.S.(Pre) 2013)

[A] Oxides of Sulphur

[B] Methane

[C] Carbon dioxide

[D] Water vapour

View Explanation

Correct Answer is A.

Oxide of Sulphur do not contribute to global warming directly, while other gases given in option contribute to global warming.

Q23. Which one of the following is NOT a green house gas found naturally in the atmosphere? (U.P.P.C.S. (Pre) 2020)

[A] Nitrogen oxide

[B] Carbon dioxide

[C] Methane

[D] Ozone

View Explanation

Correct Answer is A.

Green house gas has the property of absorbing infrared radiation emitted from Earth’s surface and reradiating it back to Earth’s surface. Carbon dioxide, Methane, ozone and water vapour are the most important green house gases, found naturally in atmosphere.
Nitrogen Oxide is not a Green House Gas found naturally in the atmosphere.

Q24. Which of the following is not Greenhouse gas? (U.P.P.C.S. (Mains) 2007)

[A] Carbon Dioxide

[B] Sulphur Dioxide

[C] Methane

[D] All the above

View Explanation

Correct Answer is B.

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.
The primary greenhouse gases in Earth’s atmosphere are water vapour, carbon dioxide, methane, nitrous oxide and ozone.

Q25. Which among the following gases is most responsible for global warming? (Uttarakhand P.C.S. (Pre) 2012)

[A] Nitrogen

[B] Methane

[C] Carbon-di-oxide

[D] Carbon mono-oxide

View Explanation

Correct Answer is C.

Greenhouse gases in the environment are water vapour, Carbon Dioxide, Methane, Nitrous oxide and Clorofluoro Carbon.
Among these, carbon dioxide is most responsible for global warming as its concentration in the environment is more as compared to other greenhouse gases. Notably, the concentration of carbon dioxide is increasing in the atmosphere.

Q26. Which one of the following is not correctly matched? (U.P.P.C.S. (Pre) 2017)

Green House Gas Source

[A] Carbon dioxide – Thermal Power Stations

[B] Chlorofluorocarbon – Automobile

[C] Nitrous Oxide – Waterlogged Paddy fields

[D] Sulphur dioxide – Brick Kilns

View Explanation

Correct Answer is B.

Chlorofluorocarbon is a man-made gaseous and liquified material made from carbon, chlorine, fluorine and oxygen which is used as a refrigerant in refrigerators and air- conditioning devices. Chlorofluoro Carbon is an important factor of ozone depletion in the atmosphere.

Q27. Which one of the following is not a Greenhouse Gas? (U.P.P.C.S. (Mains) 2012)

[A] Methane

[B] Nitrous oxide

[C] Chlorofluoro Carbon

[D] Hydrogen

View Explanation

Correct Answer is D.

Why Hydrogen is Not a Greenhouse Gas:

Chemical Properties: Hydrogen (H₂) does not absorb and re-emit infrared radiation, which is the defining characteristic of a greenhouse gas.
Atmospheric Impact: Hydrogen is not present in significant quantities as H₂ gas in the atmosphere under natural conditions. It usually reacts and combines with other elements, such as oxygen to form water (H₂O).

Q28. As a result of global warming there has been:

Better global communication
Melting of glaciers
Flowering of mango trees before times
Adverse impact on health

Select your answer from the code given below: Codes : (U.P.P.C.S. (Pre) 2003)

[A] 1, 2 and 3 are correct

[B] 2, 3 and 4 are correct

[C] 1, 2 and 4 are correct

[D] 1, 3 and 4 are correct

View Explanation

Correct Answer is B.

As a result of global warming, glaciers are melting worldwide. Species that depend on one another may become out of sync. For example, plants could bloom earlier than their pollinating insects become active.
Global warming would have an adverse impact on human health. The main categories of health risks include (i) Direct-acting effects (ii) Impacts mediated via climate-related changes in ecological systems and relationship (eg. crop fields, mosquito ecology, marine productivity).

Q29. Which of the following are the impacts of Global Warming?

Rise in sea level
Melting of glaciers
Spread of diseases
Bleaching of Coral reefs

Select the correct answer using the codes given below. (U.P.P.C.S. (Pre) 2020)

Codes :

[A] 1, 2 and 3 only

[B] 2 and 3 only

[C] 1, 3 and 4 only

[D] 1, 2, 3 and 4

View Explanation

Correct Answer is D.

Global warming causes climate change which poses a serious threat to life on the earth. Rise in sea level, melting of glaciers, spread of diseases and bleaching of coral reefs are the impacts of global warming.

Q30. Which of the following conditions indicate the impact of global warming? Select the correct answer from codes given below: Codes : (I.A.S. (Pre) 2009)