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76-90: MCQs for General Science for Govt. Exams (UPSC and SSC)
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In this lesson, Dr. Roman Saini will discuss the MCQs related to various topics in General Science from Class 6 to Class 8 (Science) NCERT.

## Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

U
sir monetary policy means?
14/15....... sir in many questions you mentioned self explanatory, if we see the video in slide mode.... v dont listen to your explanation...... i know it is too much ask, if possible provide explanation... else we can check ncert..... many thanks for your dedication
Sir Pls. see if you can provide pdf of these awesome MCQs. It takes lot of time to take snap and save these lectures.
you work hard on a daily basis,as if you are about to appear in the ias pre. which is inspiring and it forces aspirants to get more serious for their preparation..:)
10/15 Thank you sir
slipped to 8/15
1. lowing mirrs and their uses are corecty Q76. Which of the following mirrors and their uses are correctly matched? 1. Concave mirror- torches, headlights, mirror used by dentists. 2. Convex mirror- side mirrors in vehicles. Choose the correct statement/ statements. a. 1only 2 only c. Both 1 and 2 d. None of the above

2. Answer: c Explanation: A concave mirror can form a real and inverted image. When the object is placed very close to the mirror, the image formed is virtual, erect and magnified. Image formed by a convex mirror is erect, virtual and smaller in size than the object.

3. Q77. A concave lens is also known as a. Diverging lens b Converging lens c. Spherical lens c. Spherical lens d. Oval lens

4. Answer: a Explanation: Concave lens- Diverging lens (diverges/ bends outward light rays falling on it) Convex lens Converging lens (converges/ bends inward light rays falling on it). Concave mirror- Converging mirror. Convex mirror Diverging mirror.

5. Q78. When is the world water day celebrated? a. 22 March b. 22 April c. May d. March

7. Q79. Which of the following forms the largest source of fresh-water on the earth? a. b. c. Springs and waterfalls d. Glaciers and polar ice-caps Lakes and rivers Ground water

9. Q80. Which of the following is responsible for depletion of ground water? 1. Overuse 2.Concrete structures 3.Construction activities Choose the correct code. a. 1 only b. 1 and 2 only c. 2 and 3 only d. 1,2 and 3

10. Answer:d Explanation: Construction activities consume a lot of water and at many places ground water is used for these activities. Concrete structures impede infiltration of rain water into the ground.

11. Q81. Which of the following regions of India suffer from worst water shortage? a. Coastal regions b. North-eastern region c. North-western region d. The Ganga plains

13. Answer:d Explanation: Rain-water harvesting is the practice of using rain water for recharging ground water. Drip irrigation is a technique of watering plants by making use of narrow tubes which deliver water directly at the base of the plant. Bawri is an structure/ old practice of water storage and water recharge.

14. Q84. Which of the following are affected by the forests? Climate 2. Air quality 3. Water cycle 4. Tsunamis Choose the correct code. a. 1 and 2 only b. 1, 2 and 3 C. 1, 3 and 4 d. 1, 2 and 4

16. 086. Arrange the following steps in waste-water treatment in chronological order. 1. Screening 2. Clarification 3. Aeration 4. Chlorination Choose the correct code. 1-2-3-4 b. 1-3-2-4 c. 2-3-1-4 d. 3-2-1-4