(T/F) (b) CNG is more polluting fuel than petrol. (False) Q.6 Explain why fossil fuels are exhaustible natural resources. (c) Coke is almost pure form of carbon. Coke is almost pure form of carbon. 5. Coke is almost pure form of carbon. Coal tar is a mixture of various substances. Fossil fuels are formed over a period of millions of years, resulting due to the action of high temperature and … Answer: (B) Coke. Tick True/False against the following statements: (a) Fossil fuels can be made in the laboratory. (T/F) (b) CNG is more polluting fuel than petrol. (T/F) (d) Coal tar is a mixture of various substances. True/False. (T/F) (c) Coke is almost pure form of carbon. Tick True/False against the following statements: (a) Fossil fuels can be made in the laboratory. (T/F) (e) Kerosene is not a fossil fuel. (T/F) Answer. (d) Coaltar is a mixture of various substances. Presence of carbon in the steel makes it harder and more durable than pure iron. (A) Fossil fuels can be made in the laboratory. (E) Kerosene is not a fossil fuel. True/False i. Fossil fuels can be made in the laboratory. It is almost a pure form of carbon. (T/F) (e) Kerosene is not a fossil fuel. Solution: Coke is a tough, porous and black substance. (a) Fossil fuels can be made in the laboratory. Question 10: Mark the following as True/False. Answer 5. False (c) Coke is an almost pure form of carbon. (T/F) (c) Coke is almost pure form of carbon. False iii. True v. Kerosene is not a fossil fuel. (a)False (b)False (c)True (d)True (e)False. (c) Coke is almost pure form of carbon. False ii. (T/F) (e) Kerosene is not a fossil fuel. (T/F) Soln: a) False b) False c) True d) True e) False … New questions in Science Write True if the statement is correct and change the underlined word if the statement is false.1. A. Coke is almost pure form of carbon. Question 11: … (a) Fossil fuels can be made in the laboratory. (a) Fossil fuels can be made in the laboratory. Identify the substance which is tough, porous and black. It is almost a pure form of carbon. Tick True/False against the following statements. (C) Coke is almost pure form of carbon. (B) CNG is more polluting fuel than petrol. False (b) CNG is more polluting fuel as compared to petrol. Question 6 B. Coke. Dear Student The given statement is True Thanks (False) (c) Coke is almost pure form of carbon. D. Coal gas. (T/F) (d) Coal tar is a mixture of various substances. Crude oil. (a) False (b) False (c) True (d) True (E) False. Coke is the fuel obtained from coal that is almost pure form of carbon. True (d) Coaltar is a mixture of various substances. Tick True/False against the following statements: (a) Fossil fuels can be made in the laboratory. Q 6. (e) Kerosene is not a fossil fuel. Coal gas was used for street lighting for the first time in London in 1810 and in … (True) (e) Kerosene is not a fossil fuel. (T/F) (b) CNG is more polluting fuel than petrol. 5. Ans. 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