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Which of the following statements about calorific value is correct?

hard Q9 of 15
General Science - Physics (Basics)
Which of the following statements about calorific value is correct?
AIt is the amount of heat released by burning 1 litre of fuel
BIt is the amount of heat released by burning 1 kg of fuel completely
CIt is the amount of heat absorbed by 1 kg of fuel
DIt is the amount of heat required to ignite the fuel
Step-by-Step Solution
  1. Step 1: Define calorific value

    Calorific value is the heat energy released on complete combustion of unit mass of fuel.
  2. Step 2: Analyze options

    It is measured per kilogram, not per litre; it is heat released, not absorbed or ignition energy.
  3. Step 3: Eliminate incorrect options

    Heat absorbed and ignition energy are different concepts from calorific value.
  4. Final Answer:

    It is the amount of heat released by burning 1 kg of fuel completely → Option B
  5. Quick Check:

    Calorific value = Heat released per kg fuel burned ✅
Quick Trick: Calorific value = Heat released per kg fuel
Common Mistakes:
MISTAKES
  • Confusing calorific value with ignition energy or volume-based heat.
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