Water Gas Composition Explained
The question asks to identify the mixture commonly known as 'water gas'. Water gas is a crucial industrial fuel and a source of hydrogen.
Understanding Water Gas
Water gas is a synthesis gas composed primarily of carbon monoxide (CO) and hydrogen (\(H_2\)). It is produced by passing steam over red-hot coke (carbon) or other hydrocarbons at high temperatures (around 1000 degrees Celsius). The primary reaction involved is:
\(C(s) + H_2O(g) \xrightarrow{1000^\circ C} CO(g) + H_2(g)\)
This mixture is called "water gas" because it is derived from the reaction involving water (steam).
Analyzing the Options
Let's look at the given options:
- Option 1: \(H_2O + CO_2\) - This represents water and carbon dioxide, not water gas.
- Option 2: \(NH_3\) - This is ammonia, a completely different chemical compound.
- Option 3: \(H_2 + N_2\) - This mixture is known as producer gas or town gas, primarily composed of hydrogen and nitrogen.
- Option 4: \(CO + H_2\) - This mixture matches the composition of water gas.
Conclusion on Water Gas
Based on its production and composition, the mixture known as 'water gas' is carbon monoxide and hydrogen.
Therefore, the correct option representing water gas is \(CO + H_2\).
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