21UKPSC2007Environment & EcologyEnglish
In atmosphere, the highest percentage is of
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Correct option: C — Nitrogen
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Environment & Ecology MCQ practice free online · page 3
Questions from RRB, NTPC, Group D and JE past papers. Tap an option to check it instantly — every question shows the correct answer, and most carry the explanation the paper gave.
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- 22BPSC1996Environment & EcologyEnglish
The highest percentage of gas in the air is
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Correct option: D — Nitrogen
- 23RPSC2012Environment & EcologyEnglish
If all the plants and trees vanish from the earth, the gas which will decrease is
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Correct option: D — Oxygen
- 24RPSC1993Environment & EcologyEnglish
Which of the following is not a function of the tree?
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Correct option: C — Air pollution
- 25UPPSC2012Environment & EcologyEnglish
Which of the following does not add the carbon dioxide to carbon cycle on the planet Earth?
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Correct option: B — Photosynthesis
- 26UKPSC2006Environment & EcologyEnglish
The concept of weathering relates to
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Correct option: C — Natural process leading to the decomposition of rocks
- 27UPPSC2010Environment & EcologyEnglish
The headquarter of World Meteorological Organization is located at
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Correct option: A — Geneva
- 28JPSC2016Environment & EcologyEnglish
Where is the headquarter of the United Nations Environment Programme (UNEP)?
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Correct option: B — Nairobi
- 29UKPSC2003Environment & EcologyEnglish
What does EPA stand for?
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Correct option: C — Environmental Protection Agency
- 30CGPSC2003Environment & EcologyEnglish
N.E.A. stands for
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Correct option: B — National Environment Authority
Environment & Ecology practice — common questions
Page 3 of this set has 10 questions on it.
Are these Environment & Ecology questions free to practise?
Yes. Every question on this page is free and needs no account. Create a free account only if you want your progress saved.
Where do these Environment & Ecology MCQs come from?
They are taken from official past papers of Indian government recruitment exams such as RRB NTPC, RRB Group D and RRB JE, and each question keeps a reference to the exam it appeared in.
Are the questions available in Hindi?
Yes. Many papers are set in both languages, so a large share of these questions are available in Hindi. Use the language filter at the top of the page.
Do the questions show answers and explanations?
Every question shows the correct option. Where the source paper included a worked solution, the explanation is shown under "Show answer".