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196-210: 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.

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nice explanation sir. . u r best
Sir, take sound sleep. Please don't fall ill.. we desperately need yours sincere support these days. Good night.
Q-101-200---86/100--Score=162.6/200
Jan mcq finally completed . feb aaj start hoga .\,,/
  1. 0196. The process of conversion of dead vegetation into coal is called as; a. Coal evolution. a. Coal evolut b. Carbonization c. Coalification. d. Vegetization.


  2. Answer:b Explanation: Coal contains mainly carbon so the slow process of conversion of dead vegetation into coal is called carbonisation.


  3. Q197. Consider the following statements: 1. Coke is an impure form of carbon. 2. It is used in steel making. Choose the correct statement/ statements. a. 1 only b. 2 only c. Both 1 and 2 d. None of the above


  4. Answer:b Explanation: Coke is almost a pure form of carbon.


  5. Q198. Consider the following statements: 1. Coal tar is almost a pure form of carbon. 2. Coal tar is an industrial, construction waste. Choose the correct statement/ statements. a. 1 only b. 2 only c. Both 1 and 2 d. None of the above


  6. Answer:d Explanation: Coal-tar is a mixture of about 200 substances. Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry, like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc.


  7. Q199. Consider the following statements: 1. Coal gas is a source of heat. 2. Coal gas is a source of light. Choose the correct statement/ statements. a. 1 only b. 2 only c. Both 1 and 2 d. None of the above


  8. Answer: c Explanation: Coal gas was used for street lighting for the first time in London in 1810. Today, it is used as a source of heat rather than light. It is used as a fuel in many industries situated near the coal processing plants


  9. Q200. Petroleum was formed from organisms which; Lived in the forest. b. Lived in the sea. C. d. ived in Pangea. Lived in petroleum rocks.


  10. Answer:b Explanation: Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, absence of air, high temperature and high pressure ormed the dead organi


  11. Q201. In India petroleum reserves are found in; 1. Assam 2. Gujarat 3. Godavari river Basin 4. Krishna river Basin Choose the correct code a. 1 and 2 only b. 1 and 3 only c. 1, 2 and 3 only d.I, 2, 3 and 4


  12. Answer:d Explanation: Self-explanatory


  13. Answer:d Explanation: Self-explanatory


  14. 0204. The lowest temperature at which a substance catches fire is called its; lgnition temperature. b. Burning temperature. C. d. Minimum temperature. Critical temperature.


  15. Answer: a Explanation: self-explanatory


  16. 0206. Water is not used to extinguish fires involving oil or petrol because; a. Burning of oil or petrol produces so much heat that water evaporates as soon as it comes in contact with the fire Water breaks up into hydrogen and oxygen on coming in contact with such fire Water is heavier than oil and it sinks below the oil, while oil keeps burning above. Evaporation of water is not effective in such fires. b. C. d.


  17. Answer: c Explanation: self-explanatory


  18. Q208. Forest fires can be caused; 1. Spontaneously. 2. By human carelessness. Choose the correct code. a. b. c. Both 1 and 2 d. None of the above 1 only 2 only


  19. Q209. Wax burns with a flame while as charcoal burns without a flame because; a. Wax has lower ignition temperature. b. Wax can turn into a liquid while charcoal cannot. c. Wax can vaporize while charcoal cannot. d. Wax is obtained from petrochemicals. c. Wax can vaporize while chrcoal cannot.


  20. 0210. Which of the following zones of the flame has the highest temperature? a. Outer non-luminous zone. a. Outer n b.Blue coloured zone. b. Blue coloured zone. C. Red colour zone. d. Innermost zone


  21. Answer: a Explanation: The temperature of the zones of a flame goes on increasing from the centre to the exterior.