UPSC CAPF AC (Assistant Commandants) Exam 08 Aug 2021 Paper 1 (Answer Key)

UPSC (Union Public Service Commission) Conducted the UPSC CAPF AC (Central Armed Police Forces Assistant Commandant) 2021, this paper held on 08 August 2021. UPSC CAPF AC (Central Armed Police Forces Assistant Commandant) 2021 Question Paper General Ability and Intelligence With Answer Key available here.  

Exam – UPSC CAPF (AC) Exam 2021
Subject – Paper  I (General Ability and Intelligence)
Exam Date – 08^th August, 2021
BOOKLET SERIES – A

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UPSC CAPF (AC) 2021 Exam Paper
Paper – I (General Ability and Intelligence)
(Answer Key)

1. The time elapsed between viewing a lightning flash and hearing the thunder of a cloud is 10 s. If the speeds of sound and light in air are 330 m/s and 3 x 10⁸ m/s respectively, how far away is the storm?
(a) About 1650 m
(b) About 3300 m
(c) About 990 m
(d) About 1000 m

2. What is the approximate wavelength of violet light in air?
(a) 0.7 um
(b) 0:6 um
(c) 05 um
(d) 0:4 um

3. Which electromagnetic radiation(s) is/are used to cook food?
(a) Infrared radiation only
(b) Microwave radiation only
(c) Infrared and microwave radiations
(d) All electromagnetic radiations

4. An object is placed 10 cm in front of a lens. The image formed is real, inverted and of same size as the object. What is the focal length and nature of the lens?
(a) 5 cm, converging
(b) 10 cm, diverging
(c) 20 cm, converging
(d) 20 cm, diverging

5. Which one of the following statements with regard to a short-sighted person is correct?
(a) A short-sighted person sees the near objects blurred but distant objects clearly and a convex lens is used to correct this defect.
(b) A short-sighted person sees the near objects clearly but distant objects blurred and a concave lens is used to correct this defect.
(c) A short-sighted person sees the near objects blurred but distant objects clearly and a concave lens is used to correct this defect.
(d) A short-sighted person sees the near objects clearly but distant objects blurred and a convex lens is used to correct this defect.

6. Which one of the following organelles is not found in animal cells?
(a) Cell membrane
(b) Endoplasmic reticulum
(c) Cell wall
(d) Lysosome

7. Which one of the following plant tissues has large air spaces?
(a) Sclerenchyma
(b) Meristem
(c) Collenchyma
(d) Aerenchyma

8. Which one of the following is not a connective tissue?
(a) Ligament
(b) Tendon
(c) Smooth muscle
(d) Cartilage

9. Which one of the following organisms belongs to the kingdom Monera?
(a) Diatom
(b) Euglena
(c) Anabaena
(d) Ulothrix

10. Which one of the following diseases does not transmit through fine droplets coming out from mouth or nose of an infected person?
(a) Pneumonia
(b) COVID-19
(c) HIV-AIDS
(d) Tuberculosis

11. Which one of the following is not a breakdown product of glucose during respiration?
(a) Ethanol
(b) Lactic acid
(c) Water
(d) Methanol

12. Which one of the following is an example of endothermic reaction?
(a) CaO(s) + H2O₄) + Ca(OH)₂ (aq)
(b) CaCO₃(s) → CaO(s) + CO₂(g)
(c) C(s) + O₂(g) → CO₂(g)
(d) CHA(g) + 2O₂(g) → CO₂(g) + 2H₂O(I)

13. Packets of potato chips are usually flushed with which one of the following gases to prevent rancidity?
(a) Carbon dioxide
(b) Hydrogen
(c) Nitrogen
(d) Oxygen

14. According to early Indian philosophers, what are the basic elements described in Pancha Tattva ?
(a) Earth, Fire, Sky, Gas and Water
(b) Air, Earth, Fire, Sky and Water
(c) Gas, Land, Fire, Sky and Water
(d) Air, Earth, Fire, Land and Water

15. A milkman adds a small amount of baking soda to milk. This makes the pH of the milk
(a) strongly alkaline
(b) weakly alkaline
(c) strongly acidic
(d) weakly acidic

16. Which one of the following metal oxides does not usually react with sodium hydroxide?
(a) Copper oxide
(b) Aluminium oxide
(c) Potassium oxide
(d) Calcium oxide

17. When calcium metal reacts with sulphuric acid, the reaction stops after a short while. Why?
(a) The reaction of calcium with sulphuric acid is not feasible at room temperature
(b) Formed calcium sulphate is insoluble in water and covers the calcium metal, preventing it from reacting any further
(c) Formed calcium sulphate requires two molecules of water to crystallize as gypsum
(d) Formed unstable calcium sulphate is

18. When a white light beam is made to fall on a hollow prism filled with water, it breaks into seven constituent colours. Which of the following colours suffers the maximum angle of deviation?
(a) Red
(b) Violet
(c) Green
(d) All suffer by equal amount of deviation

19. The following figure shows the image of a clock in a plane mirror :

Which one of the following is the correct time?
(a) 2:35
(b) 3:45
(c) 9:15
(d) 9:25

20. Which one among the following is not a luminous object?
(a) Sun
(b) Proxima Centauri
(c) Jupiter
(d) Alpha Centauri