VINEGAR AND CITRIC ACID QUIZ

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

precipitate calcium citrate

precipitate calcium carbonate

precipitate calcium sulphate

precipitate calcium phosphate

TRUE ANSWER : ?
YOUR ANSWER : ?

Cider vinegar is produced from

ale

malted grain

fruit juices

ethanol

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YOUR ANSWER : ?

In liquid surface culture process for the fermentation to produce citric acid,

A. niger is used with solid substrate as sweet potato

A. niger floats on the surface of solution

Fungal mycelium grows through out the solution in a deep tank

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

Vinegar production consists of

anaerobic fermentation

aerobic fermentation followed by anaerobic fermentation

aerobic fermentation

anaerobic fermentation followed by aerobic fermentation

TRUE ANSWER : ?
YOUR ANSWER : ?

Spirit vinegar is produced from

fruit juices

ale

ethanol

malted grain

TRUE ANSWER : ?
YOUR ANSWER : ?

In koji process for the fermentation to produce citric acid,

A. niger is used with solid substrate as sweet potato

Fungal mycelium grows through out the solution in a deep tank

A. niger floats on the surface of solution

both (a) and (b)

TRUE ANSWER : ?
YOUR ANSWER : ?

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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YOUR ANSWER : ?

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

None of these

HCl

H2SO4

HNO3

TRUE ANSWER : ?
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Alegar is a type of vinegar produced from

ethanol

fruit juices

malted grain

ale

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4

6

5

3

TRUE ANSWER : ?
YOUR ANSWER : ?