Question:
Van Urk's test is used to identify _____ alkaloids.
Van Urk's test is used to identify _____ alkaloids.
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Van Urk's = Blue color = Ergot alkaloids.
Updated On: May 19, 2026
- Tropane
- Ergot
- Vinca
- Opium
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Specific chemical reagents are used to identify different classes of alkaloids based on their core ring system.
Step 2: Meaning
Van Urk's reagent (p-dimethylaminobenzaldehyde) is used to detect indole derivatives.
Step 3: Analysis
Ergot alkaloids (like ergotamine) contain an indole nucleus (specifically the ergoline ring). They react with Van Urk's reagent to produce a characteristic deep blue or violet color.
Step 4: Conclusion
Thus, Van Urk's test is the standard identification test for Ergot alkaloids.
Final Answer: (B)
Specific chemical reagents are used to identify different classes of alkaloids based on their core ring system.
Step 2: Meaning
Van Urk's reagent (p-dimethylaminobenzaldehyde) is used to detect indole derivatives.
Step 3: Analysis
Ergot alkaloids (like ergotamine) contain an indole nucleus (specifically the ergoline ring). They react with Van Urk's reagent to produce a characteristic deep blue or violet color.
Step 4: Conclusion
Thus, Van Urk's test is the standard identification test for Ergot alkaloids.
Final Answer: (B)
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