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Vinegar and Citric Acid

Vinegar and Citric Acid
Ethanol is oxidized to acetic acid aerobically using

Lactobacillus
Acetobacter
Gluconobacter
both (a) and (b)

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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?

3
6
4
5

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Vinegar and Citric Acid
Cider vinegar is produced from

ethanol
fruit juices
ale
malted grain

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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?

HNO3
H2SO4
HCl
None of these

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Vinegar and Citric Acid
Malt vinegar is produced from

malted grain
ale
ethanol
fruit juices

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

Aspergillus niger
Saccharomyces cerevisiae
Streptococcus lactis
Lactobacillus bulgaricus

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