Ether is formed when Ethyl alcohol is heated with conc. `H_(2)SO_(4)`The conditions are

Options

A. Excess of `H_(2)SO_(4)` and `170^(@)C`
B. Excess of `C_(2)H_(5)OH` and `140^(@)C`
C. Excess of `C_(2)H_(5)OH` and `180^(@)C`
D. Excess of conc. `H_(2)SO_(4)` and `100^(@)C`

Answer

To determine the conditions under which ether is formed when ethyl alcohol is heated with concentrated sulfuric acid, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are ethyl alcohol (C2H5OH) and concentrated sulfuric acid (H2SO4).

2. **Understand the Reaction Type**:
- The formation of ether from ethyl alcohol involves a nucleophilic substitution reaction. In this case, two molecules of ethyl alcohol react in the presence of sulfuric acid.

3. **Determine the Stoichiometry**:
- The reaction involves two moles of ethyl alcohol:
\[ 2 \, \text{C}_2\text{H}_5\text{OH} \xrightarrow{\text{conc. } H_2SO_4} \text{C}_2\text{H}_5\text{O}\text{C}_2\text{H}_5 + \text{H}_2\text{O} \]
- Here, diethyl ether (C2H5OC2H5) and water (H2O) are produced.

4. **Set the Reaction Conditions**:
- The reaction requires heating, and the temperature is crucial. It is specified that the temperature should be less than or equal to 150 degrees Celsius to favor ether formation.

5. **Choose the Appropriate Temperature**:
- A common temperature used for this reaction is 140 degrees Celsius, which is below the 150 degrees Celsius threshold. This ensures that ether is formed rather than ethylene, which would be produced if the temperature exceeded this limit.

6. **Conclusion**:
- The conditions for the formation of ether from ethyl alcohol when heated with concentrated sulfuric acid are:
- **Excess of Ethyl Alcohol (C2H5OH)**
- **Temperature: 140 degrees Celsius**

### Final Answer:
- Ether is formed when ethyl alcohol is heated with concentrated H2SO4 under the conditions of excess ethyl alcohol and a temperature of 140 degrees Celsius.