Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Equal to
Either more or less; depends on the type of fuel
More than
Less than

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Fuels and Combustion
Cannel coal

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

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