Which of the following reagents are not correctly matched with the reaction ?

Options

A. `CH_(3)CH=CHCHO to CH_(3)CH=CHCOOH:" Ammoniacal "AgNO_(3)`
B. `CH_(3)CH=CHCHO to CH_(3)CH=CHCH_(2)OH:H_(2)//Pt`
C. `R-COOH to R-CH_(2)OH:NaBH_(4)`
D. `CH_(3)CH_(2)COCl to CH_(3)CH_(2)CHO:H_(2)Pd//BaSO_(4)`

Explanation

To determine which of the given reagents are not correctly matched with their respective reactions, we will analyze each option step by step.

### Step 1: Analyze Option A
- **Reaction:** CH3CH=CHCHO + AgNO3 → CH3CH=CHEOOH
- **Reagent:** AgNO3
- **Function:** AgNO3 acts as an oxidizing agent, converting the aldehyde (CHO) into a carboxylic acid (COOH).
- **Conclusion:** This reaction is correctly matched.

### Step 2: Analyze Option B
- **Reaction:** CH3CH=CHCHO + H2 (Pt) → CH3CH=CHCH2OH
- **Reagent:** H2 with platinum (Pt)
- **Function:** H2 in the presence of platinum is a reducing agent that can reduce both aldehydes and alkenes.
- **Expected Product:** The expected product should be CH3CH2CH2CH2OH (a primary alcohol), not CH3CH=CHCH2OH.
- **Conclusion:** This reaction is not correctly matched.

### Step 3: Analyze Option C
- **Reaction:** R-COOH + NaBH4 → R-CH2OH
- **Reagent:** NaBH4
- **Function:** Sodium borohydride (NaBH4) is a reducing agent that can reduce carboxylic acids to primary alcohols.
- **Conclusion:** This reaction is correctly matched.

### Step 4: Analyze Option D
- **Reaction:** CH3CH2COCN + H2 (Pd/BaSO4) → CH3CH2CHO
- **Reagent:** H2 with palladium (Pd) and BaSO4
- **Function:** This combination is used to reduce nitriles (R-CN) to aldehydes (R-CHO).
- **Conclusion:** This reaction is correctly matched.

### Final Conclusion
The only option that is not correctly matched with its reaction is **Option B**.

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