Question

(i) Write two characteristics of an ideal fuel.
(ii) The calorific values of petrol and CNG are 45000 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?​

Answer 1

(i) The Characteristics of an ideal fuel are discussed as follows:

• The fuel should have high calorific value.
• The fuel should have proper ignition temperature.
• The rate of combustion should be balanced and moderate.
• The content of non-volatile substances should be as low as possible.

(ii) We will prefer CNG to run the vehicle. This is because the calorific value of CNG is higher than that of petrol. Therefore CNG will be more economical. At the same time it produces the least air pollutants. Thus, it causes less pollution than petrol.

Answer 2

Answer:

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Chemistry

Combustion and Flame

Fuel and Effects of Burning Fuel

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Write characteristics of an ideal fuel.

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ANSWER

The Characteristics of an ideal fuel are discussed as follows:

1. The fuel should have high calorific value.

2. The fuel should have proper ignition temperature.

3. The rate of combustion should be balanced and moderate.

4. The content of non-volatile substances should be as low as possible.

5. There should be no poisonous or residue byproducts on combustion.

6. The fuel should be easily available in plenty.

7. The fuel should be available at a low cost.

8. There should be convenience in transporting the fuel and should be easily storable.

The calorific values of petrol and CNG are 45000 kj/kg and 50000 kj/kg, respectively. If you have vehicle which can run on petrol as well as CNG, which fuel will you prefer and why? Answer: ... Therefore CNG will be more economical.

We will prefer CNG to run the vehicle. This is because the calorific value of CNG is higher than that of petrol. Therefore CNG will be more economical. At the same time it produces the least air pollutants. Thus, it causes less pollution than petrol.

Explanation:

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