HPAS 2021 Prelims Question Paper – Q58
Fats are made from edible oils using the process of:
(A) Saponification
(B) Esterification
(C) Catalytic hydrogenation
(D) Hydrogenation
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Answer: C
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HPAS 2021 Prelims Question Paper – Q59
The main precursors of winter smog are:
(A) N₂O and hydrocarbons
(B) NOx and hydrocarbons
(C) SO₂ and hydrocarbons
(D) SO₂ and ozone
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Answer: B
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HPAS 2021 Prelims Question Paper – Q60
Most kidney stones are composed of:
(A) Calcium carbonate
(B) Calcium oxalate
(C) Magnesium carbonate
(D) Magnesium oxalate
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Answer: B
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HPAS 2021 Prelims Question Paper – Q62
There are two statements given below:
Statement I: Steam produces less severe burns than water at the same temperature.
Statement II: Dry ice is colder than regular ice.
In the light of these two statements, choose the most appropriate answer from the options given below:
(A) Both Statement I and statement II are correct
(B) Both Statement I and statement II are incorrect
(C) Statement I is correct and Statement II is incorrect
(D) Statement I is incorrect and Statement II is correct
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Answer: D
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HPAS 2021 Prelims Question Paper – Q63
Arrange the following electromagnetic waves according to the increasing frequency:
(1) Gamma rays (2) X-rays (3) Radio waves (4) Microwaves
(A) (3), (4), (2), (1)
(B) (1), (2), (4), (3)
(C) (2), (1), (4), (3)
(D) (4), (3), (1), (2)
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Answer: A
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HPAS 2021 Prelims Question Paper – Q65
Consider the given four statements and choose the correct answer from the given options:
(1) A concave mirror is a diverging mirror
(2) Image formed by a concave mirror is generally real and inverted
(3) A convex mirror is a converging mirror
(4) Image formed by a convex mirror is always virtual, erect and diminished
(A) (1) and (2) only
(B) (1) and (3) only
(C) (2) and (4) only
(D) (3) and (4) only
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Answer: C
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HPAS 2021 Prelims Question Paper – Q66
Consider the given four statements about ethanol and choose the correct answer from the given options:
(1) It is the main constituent of all alcoholic drinks
(2) It is not a good solvent
(3) It is soluble in water in all proportions
(4) It cannot be used as an additive in petrol
(A) (1) and (2) only
(B) (1) and (3) only
(C) (2) and (4) only
(D) (1) and (4) only
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Answer: B
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HPAS 2021 Prelims Question Paper – Q67
Match List I with List II and choose the correct answer from the given options:
List I (Acid)
(a) Ascorbic acid (b) Malic acid (c) Formic acid (d) Tartaric acid
List II (Source)
(i) Apples and pears (ii) Ant stings (iii) Tamarind and grapes (iv) All citrus fruits
(A) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(B) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
(C) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
(D) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
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Answer: C
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HPAS 2021 Prelims Question Paper – Q68
Match List I with List II and choose the correct answer from the given options.
List I
(a) Hydrophone (b) Megaphone (c) Anemometer (d) Tachometer
List II
(i) An instrument measuring the rotation speed of a shaft or disk
(ii) An instrument that measures wind speed
(iii) An instrument that spreads sound to far-off places
(iv) An underwater device that detects and records ocean sounds from all directions
(A) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
(B) (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
(C) (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
(D) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Answer: D
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