Which of the following constituents of a fuel does not contribute to its calorific value on combustion ?
Correct answer: D. None of these
- A. Hydrogen
- B. Sulphur
- C. Carbon
- D. None of these
Explanation
Carbon, hydrogen and sulfur all release heat when oxidised, although sulfur is generally undesirable because it forms SOₓ gases. Hence none of the listed constituents is excluded from calorific-value contribution.
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