Fuels and Combustion
A coal having high volatile matter content will

Have a very high calorific value
Give less yield of tar and gas on carbonisation
Burn with a small non-smoky flame
None of these

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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
All of these
Has a high volatile matter content and burns with a luminous smoky flame
Is non-coking

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