Vinegar and Citric Acid

Question: During recovery step of citric acid, calcium citrate formed is treated with which of the following acid to precipitate calcium?
[A].

HCl

[B].

HNO3

[C].

H2SO4

[D].

None of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: For the recovery of citric acid after fermentation, Ca(OH)2 is added to the slurry to
[A].

precipitate calcium carbonate

[B].

precipitate calcium citrate

[C].

precipitate calcium phosphate

[D].

precipitate calcium sulphate

Answer: Option B

Explanation:

No answer description available for this question.

Question: In submerged process for the fermentation to produce citric acid,
[A].

A. niger is used with solid substrate as sweet potato

[B].

A. niger floats on the surface of solution

[C].

Fungal mycelium grows through out the solution in a deep tank

[D].

both (a) and (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: In liquid surface culture process for the fermentation to produce citric acid,
[A].

A. niger is used with solid substrate as sweet potato

[B].

A. niger floats on the surface of solution

[C].

Fungal mycelium grows through out the solution in a deep tank

[D].

both (a) and (b)

Answer: Option B

Explanation:

No answer description available for this question.

Question: In koji process for the fermentation to produce citric acid,
[A].

A. niger is used with solid substrate as sweet potato

[B].

A. niger floats on the surface of solution

[C].

Fungal mycelium grows through out the solution in a deep tank

[D].

both (a) and (b)

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following nitrogen sources is added in the fermentation medium of citric acid production?
[A].

Ammonium salt

[B].

Urea

[C].

Both (a) and (b)

[D].

Peptone

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ethanol is oxidized to acetic acid aerobically using
[A].

Acetobacter

[B].

Gluconobacter

[C].

both (a) and (b)

[D].

Lactobacillus

Answer: Option C

Explanation:

No answer description available for this question.

Question: Malt vinegar is produced from
[A].

fruit juices

[B].

malted grain

[C].

ethanol

[D].

ale

Answer: Option B

Explanation:

No answer description available for this question.

Question: Alegar is a type of vinegar produced from
[A].

fruit juices

[B].

malted grain

[C].

ethanol

[D].

ale

Answer: Option D

Explanation:

No answer description available for this question.

Question: Cider vinegar is produced from
[A].

fruit juices

[B].

malted grain

[C].

ethanol

[D].

ale

Answer: Option A

Explanation:

No answer description available for this question.