In the proximate analysis of a coal sample, the combustible portion that is released by (a) heating value (b) moisture heating the sample in the absence of o2 is called the: (c) volatile matter (d) fixed carbon (e) ash.

Proximate analysis of coal provides information of the moisture content, ash content, volatile matter, fixed carbon and total sulfur.

Explanation:

The proximate analysis provides information on the volatile matter that is contained within the coal sample. Volatile matter gives an indication if the coal will have good quick ignition in a boiler in a gas state. The higher the volatile matter the better quality of the coal. Fixed carbon provides the amount of carbon that can react with the air at a burner front in a solid state. The higher fixed carbon the better the coal quality. The ash content is an indication of inorganic waste material that might cause a delay in combustion of coal. The higher the ash content the less the coal quality.

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