The main product obtained by heating ethanol with concentrated sulphuric acid at 383 K is :

Options

A. Ethylene
B. Ethyl hydrogen sulphate
C. Ethyoxyethene
D. Ethoxyethane

Answer

To determine the main product obtained by heating ethanol (C2H5OH) with concentrated sulfuric acid (H2SO4) at 383 K, we can follow these steps:

### Step 1: Understand the Reactants
We have ethanol (C2H5OH) and concentrated sulfuric acid (H2SO4). Ethanol is an alcohol, and sulfuric acid is a strong acid that can act as a dehydrating agent.

**Hint:** Identify the nature of the reactants and their properties.

### Step 2: Analyze the Reaction Conditions
The reaction is performed at a temperature of 383 K. This temperature is significant because it influences the type of reaction that occurs. At this temperature, ethanol can undergo dehydration.

**Hint:** Consider how temperature affects chemical reactions, particularly dehydration reactions.

### Step 3: Determine the Role of Concentrated Sulfuric Acid
Concentrated sulfuric acid can act as a dehydrating agent. When ethanol is heated with concentrated sulfuric acid, it can lose a water molecule (H2O) to form an alkene or ether, depending on the conditions.

**Hint:** Recall that concentrated sulfuric acid can facilitate dehydration reactions.

### Step 4: Consider the Amount of Ethanol
The problem states that ethanol is in excess. This is crucial because when ethanol is in excess, the reaction favors the formation of ethers rather than alkenes.

**Hint:** Think about how the stoichiometry of the reactants influences the products formed.

### Step 5: Identify the Main Product
Since we have excess ethanol, the main product formed will be diethyl ether (C2H5OC2H5). This occurs through the reaction of two ethanol molecules, where one molecule loses a water molecule, leading to the formation of the ether.

**Hint:** Remember that excess reactants can lead to different products compared to limiting reactants.

### Conclusion
The main product obtained by heating ethanol with concentrated sulfuric acid at 383 K is **diethyl ether (C2H5OC2H5)**.

### Final Answer
The main product is diethyl ether.

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