Assertion- CNG is a better fuel than petrol- Reason- The calorific value of CNG and petrol is 50000kJ-kg and 45000 kJ-kg respectively-Assertion- Correct-Reason- Correct-Reason is the correct explanation of assertionAssertion- Incorrect-Reason- CorrectAssertion- Incorrect-Reason- IncorrectAssertion- Correct-Reason- nbsp- Incorrect-Reason is not the nbsp-correct explanation of assertion-

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Standard VII

Chemistry

Calorific Value

Assertion: CN...

Question

Assertion: CNG is a better fuel than petrol.
Reason: The calorific value of CNG and petrol is 50000kJ/kg and 45000 kJ/kg respectively.

Assertion: Correct
Reason: Correct
Reason is the correct explanation of assertion

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Assertion: Incorrect
Reason: Correct

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Assertion: Incorrect
Reason: Incorrect

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Assertion: Correct
Reason: Incorrect
Reason is not the correct explanation of assertion.

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Solution

The correct option is A Assertion: Correct
Reason: Correct
Reason is the correct explanation of assertion
The amount of heat produced during the combustion of 1 kg of a substance is called its calorific value. An ideal fuel should have high calorific value.
Since, CNG has a higher calorific value than petrol, it is a better fuel.

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(c) Assertion is correct, but reason is incorrect
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Q. Assertion: CNG is a better fuel than petrol.
Reason: The calorific value of CNG and petrol is 50000kJ/kg and 45000 kJ/kg respectively.

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Assertion: CNG is a better fuel than petrol. Reason: The calorific value of CNG and petrol is 50000kJ/kg and 45000 kJ/kg respectively.

Assertion: CNG is a better fuel than petrol.
Reason: The calorific value of CNG and petrol is 50000kJ/kg and 45000 kJ/kg respectively.