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