Multiple choice

Which among the following compounds is formed during the enzymatic oxidation of tea leaves?

  1. Catechin

  2. Gallocatechol

  3. Theaflavin

  4. Thearubigins
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D Correct answer
Explanation

Thearubigins are polymeric polyphenols that are formed during the enzymatic oxidation (called fermentation by the tea trade) of tea leaves. Thearubigins are red in colour. Therefore, a black (fully oxidized) tea gives a reddish liquor while a green or white tea gives a much clearer one.

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