General Science carries 50 marks in the AISSEE Class 9 paper (25 questions × 2 marks). These 10 MCQs on Pollution, Conservation and Stars are based on the NCERT Class 8 topics listed in the official syllabus.
Quick facts: AISSEE 2027 will be held on Sunday, 31 January 2027. There is no negative marking, so attempt every question. Online applications are open until 2 December 2026 on exams.nta.nic.in/sainik-school-society.
Practice Questions
Q1. Which gas is mainly responsible for global warming?
(A) Carbon dioxide
(B) Oxygen
(C) Argon
(D) Nitrogen
Q2. Acid rain is mainly caused by oxides of sulphur and ________.
(A) argon
(B) helium
(C) nitrogen
(D) neon
Q3. The Taj Mahal's marble is being damaged by ________.
(A) earthquakes
(B) sunlight
(C) acid rain
(D) floods
Q4. The ozone layer protects us from ________ rays of the Sun.
(A) ultraviolet
(B) radio
(C) visible
(D) infrared
Q5. Chemicals that damage the ozone layer are ________.
(A) water vapour
(B) CFCs (chlorofluorocarbons)
(C) nitrogen
(D) oxygen
Q6. An area where wild animals are protected in their natural habitat and no hunting is allowed is a ________.
(A) farm
(B) wildlife sanctuary
(C) zoo
(D) botanical garden
Q7. Plants and animals found only in a particular area are called ________ species.
(A) migratory
(B) extinct
(C) exotic
(D) endemic
Q8. Project Tiger was launched in India in ________.
(A) 2010
(B) 1973
(C) 1990
(D) 1947
Q9. The Sun is a ________.
(A) star
(B) planet
(C) comet
(D) satellite
Q10. A group of stars forming a recognisable pattern is called a ________.
(A) comet
(B) galaxy
(C) satellite
(D) constellation
Answer Key with Explanations
(A) Carbon dioxide — CO₂ traps heat in the atmosphere (greenhouse effect).
(C) nitrogen — Sulphur dioxide and nitrogen oxides dissolve in rain to form acids.
(C) acid rain — Acid rain corrodes marble, a problem called "marble cancer".
(A) ultraviolet — Ozone absorbs harmful UV rays.
(B) CFCs (chlorofluorocarbons) — CFCs from old fridges and sprays destroy ozone.
(B) wildlife sanctuary — Sanctuaries and national parks protect wildlife.
(D) endemic — Endemic species are found nowhere else naturally.
(B) 1973 — Project Tiger began in 1973 to save tigers.
(A) star — The Sun is a medium-sized star.
(D) constellation — Ursa Major (Saptarishi) and Orion are constellations.
How did you score?
9–10 correct: excellent — move on to a full-length mock test. 6–8: good — revise the explanations of the questions you missed. Below 6: study this topic again from your NCERT book and retry these questions after two days.
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