Discussion
Analysis of coal that involves determination of weight percentage of carbon, sulfur, nitrogen and oxygen is called :
Answer: C
It is called ultimate analysis.
Ultimate analysis determines the elemental composition of coal: the weight percentages of carbon, hydrogen, nitrogen, sulphur and oxygen (usually by difference). It is used for combustion calculations and for classifying coal.
Proximate analysis, the other standard coal analysis, determines moisture, volatile matter, ash and fixed carbon, not the individual elements. 'Substrate' and 'Clariviate' are not names of coal analyses.
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