Subjective Type

Although wood has a very high calorific value, we still discourage its use as a fuel. Explain.

Solution

Because of the following reasons, wood is not a fuel of choice:

(i) It has a high ignition temperature, so starting a fire in wood is a little tough.

(ii) Burning wood produces many harmful gases such as carbon monoxide and carbon dioxide. These gases are toxic and also cause air pollution.

(iii) To use wood as a fuel, we would have to cut trees. Trees are very essential for living beings and so, cutting them is not encouraged.

SIMILAR QUESTIONS

Combustion and Flame

The calorific value of a fuel is expressed in a unit called as ______________.

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Some words (underlined) in the following sentence are jumbled up. Write them in their correct form. The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ficalroic value.

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Indicate whether the following statement is True or False. Also, write the false statements in their correct form. The calorific value of wood is higher than that of coal.

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Fill in the blanks: The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its ____________.

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Write True/False against the following statements and also correct the false statement. Greater the calorific value better is the fuel.

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What do you understand by fuel efficiency?

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The calorific values of petrol and CNG are 45,000 kJ/kg and 50,000 kJ/kg, respectively. If you have a vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?

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