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Q. |
Percentage of ash by analysis of coal is given by |
A. | (weight of residue/weight of sample) × 100 |
B. | (weight of sample – weight of residue) × 100 |
C. | (weight of sample – weight of residue)/weight of sample × 100 |
D. | (weight of residue – weight of sample) × 100 |
Answer» A. (weight of residue/weight of sample) × 100 | |
Explanation: ash is weight of residue obtained after complete combustion of 1 g of coal at 700‐750°c. ash in % is given by, %a |
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