VINEGAR AND CITRIC ACID QUIZ

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

HNO3

HCl

None of these

H2SO4

TRUE ANSWER : ?
YOUR ANSWER : ?

Malt vinegar is produced from

fruit juices

malted grain

ale

ethanol

TRUE ANSWER : ?
YOUR ANSWER : ?

Cider vinegar is produced from

fruit juices

malted grain

ale

ethanol

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 floats on the surface of solution

A. niger is used with solid substrate as sweet potato

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following nitrogen sources is added in the fermentation medium of citric acid production?

Ammonium salt

Urea

Peptone

Both (a) and (b)

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

All of these

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

TRUE ANSWER : ?
YOUR ANSWER : ?

In koji process for the fermentation to produce citric acid,

both (a) and (b)

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Alegar is a type of vinegar produced from

malted grain

ethanol

fruit juices

ale

TRUE ANSWER : ?
YOUR ANSWER : ?

Which substrate is used in the fermentation of citric acid?

All of these

Sucrose

Beet molasses

Starch hydrolysate

TRUE ANSWER : ?
YOUR ANSWER : ?

Spirit vinegar is produced from

ale

fruit juices

malted grain

ethanol

TRUE ANSWER : ?
YOUR ANSWER : ?