When water gas mixed with half its volume of hydrogen and the mixture is compressed to 300 atm. Pressure and passed over `ZnO-Cr_(2)O_(3)` catalyst. A coloures liquid is obtained which is used as solvent for paints and varnishes. The liquid will be :

Options

A. Methanol
B. Ethanol and Methanol
C. ether
D. acetone

Explanation

To solve the question, we need to analyze the process described and identify the resulting liquid when water gas is mixed with hydrogen and passed over a catalyst under high pressure.

### Step-by-Step Solution:

1. **Understanding Water Gas**:
Water gas is a mixture of carbon monoxide (CO) and hydrogen (H₂). The formula can be represented as:
\[ \text{Water Gas} = \text{CO} + \text{H}_2 \]

2. **Mixing with Hydrogen**:
The problem states that water gas is mixed with half its volume of hydrogen. If we denote the volume of water gas as V, then the volume of hydrogen added is \( \frac{V}{2} \).

3. **Total Volume of Gas**:
The total volume of the gas mixture becomes:
\[ \text{Total Volume} = V + \frac{V}{2} = \frac{3V}{2} \]

4. **Compression of the Mixture**:
This gas mixture is then compressed to a pressure of 300 atm. Under high pressure, the gases will react more readily.

5. **Catalyst Used**:
The catalyst mentioned is ZnO-Cr₂O₃. This catalyst is commonly used in the industrial synthesis of methanol from carbon monoxide and hydrogen.

6. **Reaction Occurrence**:
The reaction that occurs when water gas (CO and H₂) is treated under high pressure with a suitable catalyst is:
\[ \text{CO} + 2\text{H}_2 \rightarrow \text{CH}_3\text{OH} \]
This reaction produces methanol (CH₃OH).

7. **Formation of Liquid**:
Methanol is produced in vapor form initially due to the high temperature and pressure. However, upon cooling or condensing, it forms a liquid.

8. **Identifying the Liquid**:
The liquid obtained from this process is methanol, which is commonly used as a solvent for paints and varnishes.

### Final Answer:
The liquid obtained is **Methanol (CH₃OH)**.