Ncert Exercises & Solutions

Which of the following reactions is an example of use of water gas in the synthesis of other compounds?

1. ${CH}_{4} (g) + H_{2} O (g) \to_{Ni}^{1270 K} CO (g) + H_{2} (g)$

2. $CO (g) + H_{2} O (g) \to_{Catalyst}^{673 K} {CO}_{2} (g) + H_{2} (g)$

3. $C_{n} H_{2 n + 2} + {nH}_{2} O (g) \to_{Ni}^{1270 K} nCO + (2 n + 1) H_{2}$

4. $CO (g) + 2 H_{2} (g) \to_{Catalyst}^{Cobalt} {CH}_{3} OH (l)$

Hint: Water gas is a mixture of carbon monoxide and hydrogen

The mixture of CO and H₂ is called water gas. As this mixture of CO and H₂ is used for the synthesis of methanol and a number of hydrocarbons, it is also called synthesis gas or 'syngas'. The reaction is as follows:

CO (g) + 2 H_{2} (g) \to_{Catalyst}^{Cobalt} {CH}_{3} OH (l)

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