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Vinegar and Citric Acid

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

Beet molasses
Sucrose
All of these
Starch hydrolysate

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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?

H2SO4
HNO3
HCl
None of these

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Vinegar and Citric Acid
Vinegar production consists of

aerobic fermentation followed by anaerobic fermentation
anaerobic fermentation followed by aerobic fermentation
aerobic fermentation
anaerobic fermentation

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Vinegar and Citric Acid
Alegar is a type of vinegar produced from

malted grain
ale
fruit juices
ethanol

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Vinegar and Citric Acid
Sugar content of the fermentation medium for citric acid is maintained at

20-25 %
15-20%
10-15%
25-30 %

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Vinegar and Citric Acid
Which of the following microorganism is used for the production of citric acid?

Lactobacillus bulgaricus
Aspergillus niger
Saccharomyces cerevisiae
Streptococcus lactis

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