1. What is the unit for calorific value of fuel ?(1) 2. Which type of process is combustion and also give example of rapid combustion? (1) 3. What is the composition of the head of a matchstick ?(2) 4. 60 kg of fuel was completely burnt for an experiment. The amount of heat and energy was found to be 1,80,000 kilojoule. Calculate the calorific value of fuel.(3) 5.Explain the Innermost zone and the outermost zone of the candle. (3)
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1.Calorific value is the amount of energy released or produced when 1 kg of fuel burns or any other substance is burnt in the presence of oxygen and the products of combustion are cooled to STP. Its SI unit is kJ/kg.
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