Bright Tutorials Bright Tutorials
ICSE Class 9 Chemistry Question 5 of 26

Study of the First Element — Hydrogen — Question 11

Back to all questions
11
Question

Question 8

Hydrogen is manufactured by 'Bosch Process'.

(a) Give the equations with conditions.

(b) How can you obtain hydrogen from a mixture of Hydrogen and carbon monoxide?

Answer

(a) Steam is passed over hot coke (1000°C) in furnaces of a special design, called converters, giving water gas.

Chot coke+H2Osteam→1000°C[CO+H2]water gas−Δ\underset{\text{hot coke}}{\text{C}} + \underset{\text{steam}}{\text{H}_2\text{O}} \xrightarrow{1000 \degree \text{C}} \underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} - \Delta

The reaction is endothermic.

(b) Water gas i.e., hydrogen and carbon monoxide is mixed with excess steam and passed over heated ferric oxide, which acts as a catalyst and chromic oxide Cr2O3 which acts as a promoter.

[CO+H2]water gas+H2Osteam→450°CFe2O3CO2+2H2+Δ\underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} + \underset{\text{steam}}{\text{H}_2\text{O}} \xrightarrow[450 \degree \text{C}]{\text{Fe}_2\text{O}_3} \text{CO}_2 + 2\text{H}_2 + \Delta