Chapter 4
Science
+2 college entrance (after SEE) past exam questions
Past questions and answers
4 questions set from this chapter. Most repeated first.
- 2078
The velocity of sound is maximum in
(a) Vacuum
(b) air
(c) water
(d) both a and b
Answer
(c) water
Sound needs a material medium, so it does not travel in vacuum. Its speed is greater in a denser, more elastic medium: about in air and about in water. Of the options, water is the answer (solids are faster still).
Answer checked by Claude Sonnet · Oct 21, 2026
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- 2078
Ammonia can be dried by
(a) Conc.
(b)
(c) Anhydrous
(d) None of these
Answer
(d) None of these
Ammonia is a basic gas. It reacts with conc. to form ammonium sulphate, and with (acidic) to form ammonium phosphate. It also combines with anhydrous to form . It is dried with quicklime (), which is not listed.
Answer checked by Claude Sonnet · Oct 21, 2026
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- 2078
Outermost covering of brain is called:
(a) Choroid
(b) Arachnoid
(c) Duramater
(d) All of these
Answer
(c) Duramater
The brain is covered by three meninges. From outside to inside they are the duramater (tough, outermost), the arachnoid and the piamater (innermost). The choroid is not a brain covering.
Answer checked by Claude Sonnet · Oct 21, 2026
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- 2078
The duration taken by the moon around the earth is called
(a) rotation
(b) revolution
(c) day
(d) month
Answer
(d) month
The moon takes about 27.3 days to complete one revolution around the earth, and the corresponding period is called a (lunar) month. Revolution is the motion itself, not the duration.
Answer checked by Claude Sonnet · Oct 21, 2026
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Questions from Prasadi Entrance Test 2078, +2 Science (Prasadi Academy published entrance test paper (model/sample), 2078 BS). Answers are written for this site; check them against your class notes.