Ethyl hydrogen sulphate is obtained by the reaction of `H_2SO_4` on

Options

A. Ethylene
B. Ethane
C. Ethyl chloride
D. Ethanol

Explanation

To determine the reactant that combines with sulfuric acid (H₂SO₄) to form ethyl hydrogen sulfate, we can follow these steps:

### Step 1: Identify the reactant
Ethyl hydrogen sulfate is formed from the reaction of sulfuric acid with ethanol. The chemical formula for ethanol is C₂H₅OH.

### Step 2: Write the reaction equation
The reaction can be represented as follows:
\[ \text{C}_2\text{H}_5\text{OH} + \text{H}_2\text{SO}_4 \rightarrow \text{C}_2\text{H}_5\text{OSO}_3\text{H} + \text{H}_2\text{O} \]

### Step 3: Understand the mechanism
In this reaction, sulfuric acid acts as a dehydrating agent and protonates the ethanol, leading to the formation of ethyl hydrogen sulfate (C₂H₅OSO₃H) and water.

### Step 4: Conclusion
Thus, ethyl hydrogen sulfate is obtained by the reaction of sulfuric acid (H₂SO₄) on ethanol (C₂H₅OH).

### Final Answer
Ethyl hydrogen sulfate is obtained by the reaction of H₂SO₄ on ethanol (C₂H₅OH).

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