Product obtained when cyclohexene is oxidised with acidic potassium dichromate will be

Options

A. Succinic acid
B. Adipic acid
C. Benzoic acid
D. Terephthalic acid

Answer

To determine the product obtained when cyclohexene is oxidized with acidic potassium dichromate, we can follow these steps:

### Step 1: Identify the Reactants
- The reactant is cyclohexene, which is a cyclic alkene with the formula C6H10.
- The oxidizing agent is acidic potassium dichromate (K2Cr2O7) in the presence of an acid (H+).

**Hint:** Recognize the structure of cyclohexene and the role of potassium dichromate as a strong oxidizing agent.

### Step 2: Understand the Reaction
- Potassium dichromate (K2Cr2O7) in acidic conditions is a powerful oxidizing agent that can oxidize alkenes.
- The oxidation of alkenes typically involves the cleavage of the double bond and the formation of carbonyl groups (C=O), which can further oxidize to carboxylic acids.

**Hint:** Recall that alkenes can be oxidized to form alcohols, aldehydes, or carboxylic acids depending on the conditions.

### Step 3: Predict the Oxidation Products
- When cyclohexene is oxidized, the double bond (C=C) will be broken.
- The oxidation will lead to the formation of a dicarboxylic acid since cyclohexene has two carbon atoms that can be oxidized to carboxylic acid groups.

**Hint:** Consider the structure of cyclohexene and how the oxidation will affect both carbon atoms involved in the double bond.

### Step 4: Identify the Specific Product
- The oxidation of cyclohexene with potassium dichromate will yield adipic acid (C6H10O4), which has the structure HOOC-(CH2)4-COOH.
- Adipic acid is a six-carbon dicarboxylic acid formed from the complete oxidation of cyclohexene.

**Hint:** Compare the structures of possible products (succinic acid, adipic acid, benzoic acid, terephthalic acid) to identify the correct one.

### Conclusion
The product obtained when cyclohexene is oxidized with acidic potassium dichromate is **adipic acid**.

**Final Answer:** Adipic acid (Option 2).