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Question

Argol, a brown crust, formed during the fermentation of grape juice contains

A
CO2
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B
Fused oil
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C
Potassium hydrogen tartarate
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D
lye
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Solution

The correct option is C Potassium hydrogen tartarate
After the fermentation of grape juice, a brown crystalline crust is formed. This is known as Agrol or wine-lees and it is tartaric acid in the form of the acid potassium salt.
So, the correct answer is 'Potassium hydrogen tartarate'.

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