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