Why carbon and its compounds are used as fuels for most applications? [2 MARKS]

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Solution

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1. Carbon and its compounds give large amount of heat on combustion due to high percentage of carbon and hydrogen.
2. Carbon compounds used as fuel have high optimum ignition temperature with high calorific values and are easy to handle and their combustion can be controlled. Therefore, carbon and its compounds are used as fuels.

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Q. Assertion :Carbon and its compounds used as fuels for most applications. Reason: When carbon is heated in presence of excess of air or oxygen, it forms carbon dioxide. During its formation, a large amount of heat and light are released. Further, once ignited, carbon and its compounds keep on burning without needing additional heat energy.

(a) How does ethanoic acid react with sodium hydrogen carbonate? Give the equation of the reaction which takes place.
(b) Why are carbon and its compounds used as fuels for most applications?
(c) Which of the two is better for washing clothes when the water is hard? soap or detergent? Give the reason for your answer.

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