Question

How much hydrogen is being converted on reaction with iron?

(a) 1%

(b) 5%

(c) 10%

(d) 15%

This question was posed to me during an interview for a job.

This interesting question is from Reduction of Iron Oxides in division Industrial Applications of Fluidized Beds of Fluidization Engineering

Answer 1

Right answer is (b) 5%

To explain: On evaluation, 5% of hydrogen was reacting with iron to liberate water vapour.