Concept:Water gas is a fuel gas mainly composed of carbon monoxide and hydrogen, produced from steam and coke.
Explanation:Water gas is formed by passing steam over red-hot coke (carbon).
The endothermic reaction is:
H2​O+C→CO+H2​.
The product is a mixture of carbon monoxide (
CO) and hydrogen (
H2​).
It is used in the industrial synthesis of organic chemicals and in high-temperature processes like welding and glassmaking.
Among the given options:
• Option A (mixture of
CO and
H2​) correctly describes water gas.
• Option B (mixture of
CO and
N2​) is producer gas, not water gas.
• Option C (mixture of
CO2​ and water vapour) is not a fuel gas.
• Option D (mixture of
CO and water vapour) includes steam, which is not part of water gas.
Answer:Option A: Mixture of carbon monoxide and hydrogen.