Which of the inter- molecular dehydration ?

Options

A. `ROH to R - OR`
B. `ROH to R - X`
C. `ROH to alkene `
D. `R- X to R OH`

Explanation

To solve the question regarding intermolecular dehydration, we will follow these steps:

### Step 1: Understand the Concept of Dehydration
Dehydration refers to the removal of water (H₂O) from a compound. In the context of alcohols (ROH), dehydration typically involves the removal of a hydroxyl group (OH) and a hydrogen atom (H) from adjacent carbon atoms, leading to the formation of a double bond or a new compound.

**Hint:** Remember that dehydration reactions often involve the formation of ethers or alkenes depending on the reactants and conditions.

### Step 2: Identify the Reactants
In the case of intermolecular dehydration, we are considering two alcohol molecules (ROH) reacting with each other. When two alcohols react, they can lose a water molecule.

**Hint:** Look for the presence of two identical or similar alcohol molecules in the reaction.

### Step 3: Analyze the Reaction
When two alcohol molecules (ROH) undergo intermolecular dehydration, they lose a water molecule (H₂O). The resulting product is an ether (ROR), where R represents the hydrocarbon chain.

**Hint:** Focus on the removal of H and OH from the two alcohol molecules to form the ether.

### Step 4: Evaluate the Options
Now, we need to evaluate the provided options in the question. The correct option should reflect the formation of an ether through intermolecular dehydration.

1. **Option 1:** ROH + ROH → ROR + H₂O (This is the correct answer as it shows the formation of ether)
2. **Option 2:** ROH + RX → Substitution reaction (Not dehydration)
3. **Option 3:** ROH + Alkene → Elimination reaction (Not dehydration)
4. **Option 4:** X + OH → Substitution reaction (Not dehydration)

**Hint:** Identify which option shows the removal of water and the formation of an ether.

### Step 5: Conclusion
The correct answer to the question about which reaction represents intermolecular dehydration is the first option, where two alcohols react to form an ether and water.

**Final Answer:** The first option (ROH + ROH → ROR + H₂O) is the correct representation of intermolecular dehydration.