Tag: evs

Questions Related to evs

Which of the following is the reason for the preservation of food by boiling?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. High temperature kills the bacteria by denaturing the proteins

  2. It stops the chemical reaction

  3. It changes the colour of the food

  4. All of the above

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Correct Option: A
Explanation:
Option A is correct.
At high-temperature bacteria present in the food are killed. Also, it will not affect the quality of minerals present in the food.
But, there must be some temperature, like here more than $ 100^{\circ}c$ is required to kill the bacteria.
So, this method is mainly adopted everywhere. (i.e. Boiling)

High temperature helps in the reduction of __________________.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Food poisoning

  2. Nutritional quality

  3. Food texture

  4. None of the above

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Correct Option: A

............. is the process which is used to make something free from bacteria.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Fermentation

  2. Sterlization

  3. Condensation

  4. None of these

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Correct Option: B
Explanation:
Sterilization is a thermal process generally designed to destroy the stores of the bacterium (C. botulinum). As this microorganism can easily be grown under anaerobic condition producing the deadly toxin that causes botulism. So, it requires heating temperature greater than $ 100^{\circ}C $

Pasteurization is an example of preservation of food by______________.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Heating

  2. Chemicals

  3. Fermentation

  4. None of the above

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Correct Option: A

Pasteurisation is heating at

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. 120$^o$C for $60$ minutes

  2. $60^o-63^o$C for thirty minutes

  3. $70^o$C for $60$ minutes

  4. $80^o$C for $30$ minutes

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Correct Option: B

When the milk has been pasteurised successfully, the milk will no longer contain the enzyme.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Polymerase

  2. Phosphatase

  3. Peroxidase

  4. Pyrimidinase

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Correct Option: B

For pasteurisation milk is__________.

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Warmed at $80^o$C for $5$ minutes and cooled slowly

  2. Boiled at $100^o$C and cooled slowly

  3. Treated with citric acid

  4. Warmed at $60^o$C for $20$ minutes and cooled fast

Show answer
Correct Option: D
Explanation:
(D) Warmed at $ 60^{\circ}C $ for 20 minutes & cooled fast.
$ \rightarrow $ It is a process of heating a liquid to below the Boiling point to destroy microorganisms.
Milk is heated 155 to $ 175^{\circ}$ F i.e.' in Celsius scale about 68.3 to $ 81^{\circ}C $ for an Instant followed by cooling. A standardises milk and cleans extraneous matter from it.

A treatment that keeps milk fresh for several weeks is

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Ultraviolet treatment

  2. Ultraheat treatment

  3. Infra-red treatment

  4. Freeze chilling treatment

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Correct Option: B

Food additive is

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Preservative and flavour

  2. Sweetener

  3. Stabilizer

  4. All of the above

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Correct Option: D

Pasteurised milk remains unspoilt for

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. 2-5 days

  2. One day

  3. One week

  4. Two weeks

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Correct Option: A