Fuels and Combustion
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

MgO & Na₂CO₃
MgSO₄ & BaCl₂
MgCO₃ & NaCl
BaSO₄ & NaCl

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Fuels and Combustion
With increase in the temperature of carbonisation of coal

All of these
Hydrogen content of coke oven gas increases due to cracking of hydrocarbons
Methane content in the coke oven gas decreases and carbon monoxide content increases
Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content

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Fuels and Combustion
Cannel coal

Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named
Is non-coking
All of these
Has a high volatile matter content and burns with a luminous smoky flame

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