PRELIMS 2021 KEYS RAJA sir cracking IAS Academy

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February 01, 2021 - Daily Quiz

1. Land masses are heated and cooled much faster than water bodies.

1. Land gets heated by conduction. 2. Water has a higher specific heat. 3. Only the surface layer of water is heated. 4. Water gets heated by convection. Which of the following statements justifies it? (a) 1, 2 and 3 (b) 2 and 3 (c) 1 and 4

(d) 1, 2 and 4

2. What is the similarity between Milwaukee Deep, Java Trench and Challenger Deep? (a) They all are trenches in the Pacific Ocean (b) They are the deepest points of the Atlantic, Indian and Pacific Oceans, respectively (c) They all are trenches in the India Ocean (d) They all are deeps of the Atlantic Ocean
3. A cube of side 25 cm has been painted on all faces and was divided into 125 smaller equal cubes. Answer the following. How many cubes are painted from 3 sides? (a) 9 (b) 8 (c) 12 (d) 5 4. Why DDT was banned which an organ chlorine compound, used first to control malaria, carried in mosquitoes and later to a variety to insect pests? (a) It brings about a change in sex chromosomes (b) It persists in the environment and bio-accumulates (c) It increases its affinity hundred-fold for hemoglobin preventing its coupling with oxygen (d) All of these ANSWERS 1. (d)  2. (b) 3. (b) 4. (b)


POSTED ON 01-02-2021 BY ADMIN
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