Discussion
Coal of \( 2.4 \) per cent sulphur is burnt at \( 500 \) tonnes a day with complete conversion to sulphur dioxide. The daily emission is
Answer: A
The sulphur is \( 500 \times 0.024 = 12 \) tonnes, and each tonne of sulphur gives two tonnes of sulphur dioxide because the molecular masses are 32 and 64. Emissions therefore scale directly with the fuel's sulphur content.
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