Question

The % of the fixed carbon can be given by _________

(a) %C=[loss in weight due to removal of C/weight of coal sample]*100

(b) %C=[weight of coal/12*100]

(c) %C=100-(% of ash)

(d) %C=100-(% of moisture+% of volatile matter+% of ash)

The question was posed to me in final exam.

Enquiry is from Analysis of Coal and Selection topic in portion Fuel Technologies of Applied Chemistry

Answer 1

Correct option is (d) %C=100-(% of moisture+% of volatile matter+% of ash)

Easy explanation: The % of carbon can be determined easily because the coal will have the highest amount of carbon content. So, from 100 we have to subtract the other contents % to get % of carbon.