Question

The method for preparation of water gas is:

• A. Burning coke in excess of air
• B. Oxidation of C in limited supply of oxygen
• C. Passing steam over hot coke
• D. Passing air over hot coke

Hint:

Water gas is typically produced by the reaction of steam with hot coke. Remember, the other methods listed are not used for water gas production.

Answer 1

The Correct Option is C

Water gas is a mixture of carbon monoxide (CO) and hydrogen (H$_2$) produced by passing steam over hot coke (carbon). The reaction is as follows: \[ C(s) + H_2O(g) \rightarrow CO(g) + H_2(g) \] - In this process, steam reacts with hot coke to produce carbon monoxide and hydrogen.
- This method is commonly used in the industrial production of water gas.
Thus, the correct method for the preparation of water gas is passing steam over hot coke.

Answer 2

The preparation of water gas involves a chemical reaction where steam is passed over hot coke. This process is primarily utilized to produce a mixture of hydrogen and carbon monoxide, known as water gas. The reaction is represented by the following chemical equation:

C (s) + H₂O (g) ⇌ CO (g) + H₂ (g)

In this process, coke (a form of carbon derived from coal) is heated to a high temperature, and steam is introduced. The endothermic reaction between steam and coke produces carbon monoxide (CO) and hydrogen gas (H₂). This method is distinct from simply burning coke, which would involve a large supply of air or oxygen resulting in complete combustion to CO₂ rather than forming the desired gases.

The correct answer is: Passing steam over hot coke.