In which reaction the product is not correctly given ?

Options

A. `PhOCH_3+Br_(2)overset(FeBr_3)(rarr)(##NTA_NEET_SET_105_E02_036_O01.png" width="30%">
B. `PhCOOH+CH_3CH_2Cloverset(AlCl_3)(rarr)(##NTA_NEET_SET_105_E02_036_O02.png" width="30%">
C.
D. Both A and B

Answer

To determine which reaction's product is not correctly given, we need to analyze each option provided in the question. Let's break down the analysis step by step.

### Step 1: Analyze Option A
- **Reaction**: pH OCH3 reacting with Br2 in the presence of FeBr3.
- **Explanation**: The methoxy group (OCH3) is an ortho-para directing group due to its +M effect, which increases the electron density at the ortho and para positions of the benzene ring. Therefore, bromination will occur at these positions.
- **Products**: The expected products are ortho-bromo and para-bromo derivatives of the methoxybenzene. The meta product is not formed because the electron density does not increase at the meta position.
- **Conclusion**: The product is correctly given for this reaction.

### Step 2: Analyze Option B
- **Reaction**: Benzoic acid (C6H5COOH) reacting with CH3CH2Cl in the presence of AlCl3.
- **Explanation**: The carboxylic acid group (COOH) is a deactivating group, which decreases the electron density on the benzene ring. Therefore, Friedel-Crafts alkylation (which is what this reaction represents) does not occur because the ring is too deactivated to react.
- **Products**: No reaction occurs, hence no product is formed.
- **Conclusion**: The product is not correctly given for this reaction.

### Step 3: Analyze Option C
- **Reaction**: Alkyl benzene reacting with KMnO4 in acidic medium and heat.
- **Explanation**: KMnO4 oxidizes alkyl groups on the benzene ring to carboxylic acids. Therefore, the product of this reaction will be benzoic acid.
- **Products**: The product is correctly given as benzoic acid.
- **Conclusion**: The product is correctly given for this reaction.

### Final Conclusion
From the analysis:
- Option A: Correctly given.
- Option B: Not correctly given (no product formed).
- Option C: Correctly given.

Thus, the answer to the question "In which reaction the product is not correctly given?" is **Option B**.