SELECT * FROM question_mgmt as q WHERE id=6585 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=368 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Coal and Petroleum tick true false against the following statements

Question:

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)
(c) Coke is almost pure form of carbon. (T/F)
(d) Coal tar is a mixture of various substances. (T/F)
(e) Kerosene is not a fossil fuel. (T/F)

Answer:

(a) False

This statement is false because the fossil fuels are made up of natural processes.

(b) False

This statement is false because CNG is a clean fuel. It does not produce any harmful gases behind whereas the petrol does.

(c) True

This statement is true because coke is the pure form of the carbon. Carbon is found in many forms like coal, petroleum and coke.

(d) True

This statement is true because coal tar is not the pure form of carbon. It is made up of the mixing of different substances.

(e) False

This statement is false because kerosene oil is also a fossil fuel. The process of making fossil fuel takes much time. Ti is made up of dead vegetation which burried deep in the soil by the natural activities.


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