The heat produced by burning 1 g of fuel completely is known as _____________.

heat capacity

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calorific value

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vapour density

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boiling point

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Solution

The correct option is C calorific value
Calorific value is the quantity of heat produced by the complete combustion of a given mass of a fuel, usually expressed in joules per kilogram. It can be defined as the amount of heat energy produced on complete combustion of 1 Kg of fuel.

Hence, the correct option is $B$

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