Question

In ultimate analysis, %hydrogen is given by __________

(a) (Increase in weight of CaCl2 tube×2×100 / weight of coal sample taken×18)

(b) (Increase in weight of KOH tube×2×100 / weight of coal sample taken×18)

(c) (Increase in weight of CaCl2 tube×4×100 / weight of coal sample taken×18)

(d) (Increase in weight of KOH tube×4×100 / weight of coal sample taken×18)

The question was posed to me in semester exam.

I would like to ask this question from Analysis of Coal in portion Fuels and Combustion of Engineering Chemistry II

Answer 1

Correct answer is (a) (Increase in weight of CaCl2 tube×2×100 / weight of coal sample taken×18)

For explanation I would say: %hydrogen= (weight of hydrogen/weight of coal sample taken) × 100

In ultimate analysis of coal,

%H = (Increase in weight of CaCl2 tube×2×100 / weight of coal sample taken×18).