Question

Match with the tab test of amino acids.

• A. A \(\rightarrow\) I, B \(\rightarrow\) IV, C \(\rightarrow\) III, D \(\rightarrow\) II
• B. A \(\rightarrow\) IV, B \(\rightarrow\) I, C \(\rightarrow\) II, D \(\rightarrow\) III
• C. A \(\rightarrow\) I, B \(\rightarrow\) III, C \(\rightarrow\) IV, D \(\rightarrow\) II
• D. A \(\rightarrow\) IV, B \(\rightarrow\) II, C \(\rightarrow\) I, D \(\rightarrow\) III

Answer 1

The Correct Option is B

Step 1: Analyzing the tab tests.
- Hinsberg test (I) is used to distinguish between primary, secondary, and tertiary amines. Lysine, which contains a primary amine group, gives a positive Hinsberg test. - Neutral \( \text{FeCl}_3 \) (II) is used for testing phenolic compounds. Tyrosine, which contains a phenolic group, gives a positive result with neutral \( \text{FeCl}_3 \). - Cerric ammonium nitrate (III) is used to test alcohols, and Serine, which contains a hydroxyl group, will give a positive test with Cerric ammonium nitrate. - Hoffmann Bromamide (IV) is used to test for amides, and Glutamine, being an amide, will give a positive result.
Step 2: Conclusion.
The correct matching is: - Glutamine (\( \text{A} \)) gives a positive Hoffmann Bromamide test (IV),
- Lysine (\( \text{B} \)) gives a positive Hinsberg test (I),
- Tyrosine (\( \text{C} \)) gives a positive result with neutral \( \text{FeCl}_3 \) (II),
- Serine (\( \text{D} \)) gives a positive result with Cerric ammonium nitrate (III).
Thus, the correct answer is: \[ \text{(B) A \(\rightarrow\) IV, B \(\rightarrow\) I, C \(\rightarrow\) II, D \(\rightarrow\) III} \]
Final Answer: (B) A \(\rightarrow\) IV, B \(\rightarrow\) I, C \(\rightarrow\) II, D \(\rightarrow\) III.