12 Questions
What is the usual source of tannins?
Barks/stems
Which of the following is NOT a characteristic of Ellagitannins?
Precipitate leather
Which compounds can become true tannins when many of them combine together?
Chlorogenic acid
What is the main distinguishing feature of Hydrolysable Tannins/Pyrogallol Tannins?
Contain glucose
Which type of tannin is described as difficult to separate because they do not crystallize?
Pseudotannins
What is the primary property of tannins that allow them to preserve animal skin/hide?
Astringent
What is the term used to describe the leather formed after dry distillation?
Bloom
Which type of tannins are further classified based on the phenolic aglycones?
Condensed tannins
What is the color of the precipitate formed by Pyrocatechol tannins?
Violet
Which compound is a precursor to the formation of 'Tanner's red' leather?
Phlobaphenes
What is the common flavonoid nucleus found in materials like pomegranate rind and bark?
Hexahydroxydiphenic acid (HHDPA)
What does the term 'Phlobatannins' refer to?
Nonhydrolyzable tannins
This quiz provides information about tannins, which are polyphenol compounds commonly found in barks and stems. It covers the properties of tannins, how they combine with proteins, and their role in preserving animal skin to form leather. The quiz also differentiates between true tannins and pseudotannins.
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