Q10 of 87 Page 105

Name one solid, one liquid and one gas which burn by producing a flame.

Molten wax(Solid), Kerosene oil(Liquid) and LPG(gas) are the substances which burn by producing flames.


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8

Which of the following fuels has the highest calorific value?

Diesel, Methane, CNG, Coal, Petrol

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Name the term which is used to express the efficiency of a fuel.

 11

Which of the following does not produces a flame on burning?

 12

Name one fuel which burn without producing a flame.