Question

the fixed carbon content is the carbon found in the material which is left after volatile materials are driven off. a) true b) false

Answer 1

This statement is false.  

The fixed carbon content of coal is the whole solid residue rather than just the carbon part of it.

The fixed carbon content of coal, is the solid combustible residue that remains after a sample of coal is heated and volatile matter is expelled ( this includes moisture and ashes).