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Vinegar and Citric Acid

Vinegar and Citric Acid
Spirit vinegar is produced from

ale
malted grain
ethanol
fruit juices

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Vinegar and Citric Acid
In liquid surface culture process for the fermentation to produce citric acid,

A. niger floats on the surface of solution
Fungal mycelium grows through out the solution in a deep tank
A. niger is used with solid substrate as sweet potato
both (a) and (b)

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Vinegar and Citric Acid
In koji process for the fermentation to produce citric acid,

A. niger floats on the surface of solution
A. niger is used with solid substrate as sweet potato
Fungal mycelium grows through out the solution in a deep tank
both (a) and (b)

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Vinegar and Citric Acid
In submerged process for the fermentation to produce citric acid,

A. niger floats on the surface of solution
both (a) and (b)
A. niger is used with solid substrate as sweet potato
Fungal mycelium grows through out the solution in a deep tank

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Vinegar and Citric Acid
Which substrate is used in the fermentation of citric acid?

Starch hydrolysate
All of these
Beet molasses
Sucrose

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Vinegar and Citric Acid
During recovery step of citric acid, calcium citrate formed is treated with which of the following acid to precipitate calcium?

HCl
H2SO4
HNO3
None of these

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