NURSING ANM AND GNM

NURSING EXAM QUESTIONS

PHARMACOGNOSY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Tannic acid is an astringent and an alkaloidal precipitant
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Tannins precipitate alkaloids and proteins and have been used in cases of alkaloid poisoning.

Detailed explanation-2: -Tannic acid is a type of polyphenol and is also called Acidum tannicum or Gallotannic acid. Tannic acid has numerous phenol groups and hence is a weak acid. It is obtained naturally from tara pods, Quercus infectoria, gallnuts from Rhus semialata, Sicilian Sumac leaves.

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