PRELIMS 2021 KEYS RAJA sir cracking IAS Academy

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Prelims Daily Questions

February 04, 2021 - Daily Quiz

1. Consider the following statements:

  1. The axis of the Earth’s magnetic field is inclined at to the geographic axis of the Earth.
  2. The Earth’s magnetic pole in the Northern hemisphere is located on a peninsula in Northern Canada.
  3. Earth’s magnetic equator passes through Thumba in South India.
Which of the statement(s) given above is/are correct? (a) 2 only (b) 1 and 2 only (c) 2 and 3 only

(d) 1, 2, and 3

2. The first enzyme that helps in the process of digestion (a) Pepsin (b) Lipase (c) Amylase (d) Ghrelin
3. In covering a distance of 30 km, A takes 2 hours more than B. If A doubles his speed, then he would take 1 hour less than B. A’s speed is (a) 2 kmph (b) 5 kmph (c) 4 kmph (d) 6 kmph 4. What are the date/dates on which day and night are equal in both the hemispheres? (a) June 21 (b) December 22 (c) March 21 and September 23 (d) June 21 and December 22 5. Consider the following statements and select the correct answer using the codes given below: Assertion (A): The length of the day at the equator is always 12 hours. Reason (R): The angle of incidence of the Sun’s rays at the equator is constant. Codes: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true, but R is not the correct explanation of A. (c) A is true, but R is false. (d) A is false, but R is true. ANSWERS 1. (c) The angle at which the magnetic field lines intersect the surface of the earth. This angle ranges from 0 degrees at the equator to 90 degrees at the poles. Intensity: The magnetic field also varies in strength over the earth’s surface. It is strongest at the poles and weakest at the equator 2. (c) The salivary glands present in mouth secrete salivary amylase enzyme which digests the starch present in food into sugar. Digestion of starch or carbohydrate starts in mouth itself. Therefore, amylase is the first enzyme that helps in the process of digestion. 3. (b) 4. (c) It happens during Vernal Equinox (21st March) and Autumn Equinox (September 23) 5. (a) 


POSTED ON 04-02-2021 BY ADMIN
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