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Questions Related to evs

Which of the following are commonly used as food preservatives?

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

  1. Boric acid and zinc phosphide

  2. Bleaching powder and chlorine compounds

  3. 2, 4-D and zinc phosphide

  4. Sodium benzoate and sodium metabisulphite

Show answer
Correct Option: D
Explanation:

Food preservatives are chemicals that are used to inhibit microbial growth in food. These chemicals are food additives and increase the shelf life of food. Sodium benzoate and sodium metabisulphite are the common food preservatives used in jams, jellies etc. Thus the correct answer is option D.

Which of the following is not paired correctly?

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

  1. Alexander Fleming - Penicillin

  2. Leeuwenhoek - Microscope

  3. Elic Metchnikoff - Phagocytes

  4. Louis Pasteur - Antiseptic

Show answer
Correct Option: D
Explanation:

Louis Pasteur is regarded as one of the greatest saviors of humanity and was responsible for the discovery of pasteurization. His pasteurization process concluded that all fermentable liquid could be prevented from a spoiling with a special heating treatment.

So, the correct option is 'Louis Pasteur - Antiseptic'.

Vinegar used as preservative for pickles, is _____ % aqueous solution of acetic acid.

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

  1. 1 to 2

  2. 5 to 8

  3. 25 to 30

  4. 100

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Correct Option: A

Heating milk at 65$^o$C followed by sudden cooling is known as

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

  1. Sterilization

  2. Preservation

  3. Pasteurization

  4. Fermentation

Show answer
Correct Option: C
Explanation:

Pasteurization is a heat treatment process where the milk is heated at 60-70$^0$C for 15 to 30 seconds and suddenly chilled and store. This method is used to kill the bacteria in liquid and foods and inhibits their further growth. It is named for the French scientist, Louis Pasteur, who gave this preservation technique in the 1860s.

Pasteurised milk is

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

  1. Sterile and will not turn sour

  2. Free from pathogenic bacteria

  3. Not free from bacteria

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Pasteurization is the preservation technique of milk. It is used 

  1. To increase milk safety for the consumer by destroying disease-causing microorganisms (pathogens) that may be present in milk.
  2. To increase keeping the quality of milk products by destroying spoilage microorganisms and enzymes that contribute to the reduced quality and shelf life of milk.
Therefore, the correct answer is option D.

Pasteurization means_____________

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

  1. Vaccination of a baby against smallpox

  2. Sterilization in steam cooker at 100$^{\circ}$C

  3. Heating milk or other liquids to 60$^{\circ}$C to 70$^{\circ}$C for short duration

  4. A technique of curing people bitten by mad dogs

Show answer
Correct Option: C
Explanation:

Pasteurization is a heat treatment process where the milk is heated at 70$^0$C for 15 to 30 seconds and suddenly chilled and store. This method is used to kill the bacteria in liquid and foods and inhibits their further growth. It is named for the French scientist, Louis Pasteur, who gave this preservation technique in the 1860s. Thus, the correct answer is option C. 

Food spoilage can be prevented by

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

  1. Heating of food

  2. Using chemicals

  3. Canning

  4. All of the above

Show answer
Correct Option: D
Explanation:

When the food is not edible to humans or its quality of edibility becomes reduced is called as food spoilage and the food which get easily spoiled called as perishable food. Various external factors are responsible for the spoilage of food.

A number of methods of prevention can be used that can either totally prevent, delay, or otherwise reduce food spoilage such as the addition of chemical preservatives, refrigeration, Freezing, boiling of foods above the danger zone (140$^{\circ}$F/58$^{\circ}$C) for over 24 hours and canning of food can preserve food for a particularly long period of time. Thus, the correct answer is option D.

Milk can be preserved by __________________

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

  1. Pasteurization

  2. Drying

  3. Chemical preservatives

  4. Freezing

Show answer
Correct Option: A
Explanation:
  • Pasteurization is a process of heating the milk enough to kill the most of the bacteria which can spoil the milk. This prevents milk spoiling for a longer time. 

Which of the following diseases has incubation period less than one week?

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

  1. Tuberculosis

  2. Leprosy

  3. Influenza

  4. Food poisoning

Show answer
Correct Option: D
Explanation:

The time between the infection in the host by a pathogen and the host begins to show symptoms is called as the incubation period. Some diseases have rapid incubation period whereas some have a longer period of incubation. food poisoning is the infection caused by the ingestion of spoiled food, has very rapid incubation period i.e., less than one week.

Pasteurised milk is______________

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

  1. Sterile and will not turn sour

  2. Free from pathogenic bacteria

  3. Not free from bacteria

  4. Both A and B

Show answer
Correct Option: D
Explanation:
  • Pasteurization is a process of heating food, which is usually a liquid, to a specific temperature for a predefined length of time and then immediately cooling it after it is removed from the heat. 
  • Raw milk is milk from cows, sheep, or goats that has not been pasteurized to kill harmful bacteria. 
  • This raw, unpasteurized milk can carry dangerous bacteria such as Salmonella, E. coli, and Listeria, which are responsible for causing numerous foodborne illnesses.
  •  Pasteurization makes sure milk is safe to drink by killing any bacteria and also helps to prolong its shelf life.
  •  The process of pasteurization involves heating milk to 71.7°C for at least 15 seconds. Once the milk has been heated, it is then cooled very quickly to less than 3°C.