GATE 2025 ES – Question 59
A boiler burns1 kg/s coal containing3% sulfur. Assume all sulfur becomes SO₂ and no sulfur remains in ash. Find SO₂ emissions in integer kg/day.
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Correct answer: 5184 to 5184
Explanation
Sulfur input is $.03$ kg/s. Each mole of S produces one mole SO₂,whose molecular mass is twice that of S, so SO₂ mass flow is $.03(64/32)=.06$ kg/s. Over86400 seconds per day, this is $.06(86400)=\mathbf{5184}$ kg/day.