Choose the quantity of fuel from the given options which will produce more heat (Calorific value of 1 kg of Z is 50,000 kJ/kg).

3 kg

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5 kg

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2 kg

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4 kg

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Solution

The correct option is B
5 kg

The calorific value of a substance is the amount of heat liberated by the complete combustion of 1 kg of fuel.

Total heat produced by 3 kg of fuel = 3 $\times$ 50000 = 150000 J

Total heat produced by 5 kg of fuel = 5 $\times$ 50000 = 250000 J

Total heat produced by 2 kg of fuel = 2 $\times$ 50000 = 100000 J

Total heat produced by 4 kg of fuel = 4 $\times$ 50000 = 200000 J

Therefore, 5 kg of fuel Z will produce more heat.

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