VINEGAR AND CITRIC ACID QUIZ

Malt vinegar is produced from

fruit juices

malted grain

ethanol

ale

TRUE ANSWER : ?
YOUR ANSWER : ?

Ethanol is oxidized to acetic acid aerobically using

both (a) and (b)

Acetobacter

Gluconobacter

Lactobacillus

TRUE ANSWER : ?
YOUR ANSWER : ?

Cider vinegar is produced from

ale

malted grain

ethanol

fruit juices

TRUE ANSWER : ?
YOUR ANSWER : ?

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

both (a) and (b)

Fungal mycelium grows through out the solution in a deep tank

A. niger is used with solid substrate as sweet potato

A. niger floats on the surface of solution

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Aspergillus niger

Streptococcus lactis

Lactobacillus bulgaricus

Saccharomyces cerevisiae

TRUE ANSWER : ?
YOUR ANSWER : ?

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

precipitate calcium phosphate

precipitate calcium sulphate

precipitate calcium citrate

precipitate calcium carbonate

TRUE ANSWER : ?
YOUR ANSWER : ?

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

20-25 %

15-20%

10-15%

25-30 %

TRUE ANSWER : ?
YOUR ANSWER : ?

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

5

4

6

3

TRUE ANSWER : ?
YOUR ANSWER : ?

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

HCl

H2SO4

HNO3

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Alegar is a type of vinegar produced from

ale

malted grain

fruit juices

ethanol

TRUE ANSWER : ?
YOUR ANSWER : ?

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