Question

In determination of % of C and H, the coal is burnt in the stream of _______

(a) pure sulphur

(b) pure nitrogen

(c) pure alcohol

(d) pure oxygen

This question was addressed to me in an interview for internship.

The above asked question is from Analysis of Coal and Selection in chapter Fuel Technologies of Applied Chemistry

Answer 1

Right choice is (d) pure oxygen

To explain I would say: The carbon and hydrogen are burnt in the stream of pure oxygen so that they get converted into CO2 and H2O which are passed through Cacl2 and KOH bulbs.