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Vinegar and Citric Acid

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

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

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Vinegar and Citric Acid
For the recovery of citric acid after fermentation, Ca(OH)2 is added to the slurry to

precipitate calcium citrate
precipitate calcium sulphate
precipitate calcium phosphate
precipitate calcium carbonate

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Vinegar and Citric Acid
Malt vinegar is produced from

fruit juices
ethanol
malted grain
ale

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Vinegar and Citric Acid
Spirit vinegar is produced from

ale
ethanol
fruit juices
malted grain

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

Aspergillus niger
Lactobacillus bulgaricus
Streptococcus lactis
Saccharomyces cerevisiae

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Vinegar and Citric Acid
What is the pH of the medium when sucrose is used as substrate for the production of citric acid?

6
5
4
3

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