Question

Modified Borntrager's test is used to detect

• A. O-glycosides
• B. N-glycosides
• C. C-glycosides
• D. S-glycosides

Hint:

Borntrager's = O-glycosides; Modified Borntrager's = C-glycosides (Aloe).

Answer 1

The Correct Option is C

Step 1: Concept
Borntrager's test is used to identify anthraquinone glycosides.

Step 2: Meaning
O-glycosides (like Senna) are easily hydrolyzed and respond to the standard Borntrager's test. C-glycosides (like those in Aloe) have a more stable carbon-carbon bond.

Step 3: Analysis
The standard test fails for C-glycosides because they require stronger oxidative hydrolysis using ferric chloride and hydrochloric acid to release the anthraquinones. This variation is called the "Modified Borntrager's test".

Step 4: Conclusion
Consequently, the modified test is specifically used for C-glycosides.

Final Answer: (C)