Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : `alpha-`halocarboxylic acid on reaction with dill NH3 gives good yield of `alpha`-amino carboxylic acid where as the yield of amines is very low when prepared form alkyl halides.
Reason (R) : Amino acids exist in zwitter ion form in aqueous medium.
In the light of the above statements, choose the correct answer form the options given below :

Options

A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
B. (A) is not correct but (R) is correct
C. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
D. (A) is correct but (R) is not correct

Answer

To solve the question, we need to analyze both the Assertion (A) and the Reason (R) provided.

### Step 1: Analyze the Assertion (A)
The assertion states that "alpha-halo-carboxylic acid on reaction with dilute NH3 gives good yield of alpha-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides."

- **Understanding the Reaction**: Alpha-halo-carboxylic acids can undergo nucleophilic substitution reactions with ammonia (NH3) to form alpha-amino acids. This is a well-known reaction in organic chemistry.
- **Yield Comparison**: The assertion claims that the yield of alpha-amino carboxylic acids is good, while the yield of amines from alkyl halides is low. This is true because alkyl halides tend to undergo elimination reactions rather than substitution, leading to lower yields of amines.

### Step 2: Analyze the Reason (R)
The reason states that "Amino acids exist in zwitterion form in aqueous medium."

- **Understanding Zwitterion**: A zwitterion is a molecule that has both positive and negative charges but is overall neutral. In the case of amino acids, they typically have a carboxylate group (COO-) and an ammonium group (NH3+), making them zwitterionic in nature when dissolved in water.
- **Relation to Yield**: The zwitterionic form of amino acids can affect their reactivity and solubility, which may contribute to the differences in yields observed when synthesizing amines from alkyl halides versus alpha-halo-carboxylic acids.

### Conclusion
- Both the assertion and the reason are true.
- The reason correctly explains the assertion because the zwitterionic form of amino acids influences their formation and stability in aqueous solutions.

### Final Answer
Both Assertion (A) and Reason (R) are correct, and the reason explains the assertion correctly. Therefore, the correct answer is option 1.

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