VINEGAR AND CITRIC ACID QUIZ

Sugar content of the fermentation medium for citric acid is maintained at

25-30 %

10-15%

20-25 %

15-20%

TRUE ANSWER : ?
YOUR ANSWER : ?

Malt vinegar is produced from

fruit juices

ethanol

ale

malted grain

TRUE ANSWER : ?
YOUR ANSWER : ?

Alegar is a type of vinegar produced from

fruit juices

malted grain

ale

ethanol

TRUE ANSWER : ?
YOUR ANSWER : ?

Spirit vinegar is produced from

malted grain

ethanol

fruit juices

ale

TRUE ANSWER : ?
YOUR ANSWER : ?

In submerged 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

both (a) and (b)

Fungal mycelium grows through out the solution in a deep tank

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following microorganism is used for the production of citric acid?

Streptococcus lactis

Lactobacillus bulgaricus

Aspergillus niger

Saccharomyces cerevisiae

TRUE ANSWER : ?
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What is the pH of the medium when molasses is used as substrate for the production of citric acid?

5

4

6

3

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

HNO3

None of these

HCl

H2SO4

TRUE ANSWER : ?
YOUR ANSWER : ?

Vinegar is typically produced in fed batch reactors because

acetic acid bacteria tend to ferment at high ethanol concentrations

a fed batch reactor can be used to maintain low acetic acid concentrations

a fed batch reactor can be used to maintain low ethanol concentrations

All of these

TRUE ANSWER : ?
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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 : ?