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

Milk is heated to $72^0$ C for 30 minutes and then suddenly cooled to $12^0$ C. Microbes are killed without causing damage to the taste and quality of milk. Name this process.

  1. Dehydration

  2. Pasteurisation

  3. Boiling

  4. Cooling
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process described, heating milk to a specific temperature and then cooling it suddenly to kill microbes while preserving quality, is the definition of pasteurization.

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

Pasteurization means

  1. Vaccination for a baby against small pox
  2. Sterilization in steam cooker at 100$^o$C for 10 minutes
  3. Heating milk or other liquids to 60$^o$C to 70$^o$C for short duration

  4. A technique of curing people bitten by mad dogs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pasteuriziation is the process of sterilization. In this, packaged and non-packaged milk and other liquids are heated with mild heat, that is 60$^o$C to 70$^o$C for short duration in order to eliminate pathogens and extend shelf-life. The process was first developed by Louis Pasteur in 1864.

Thus, the correct answer is 'Heating milk or other liquids to 60$^o$C to 70$^o$C for short duration.'

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

Which one among the following causes food poisoning?

  1. Clostridium botulinum

  2. Salmonella typhosa

  3. Clostridium tetani

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Food poisoning is caused by Clostridium botulinum. Botulism is a life-threatening bacterial disorder that is caused by Clostridium botulinum. It grows on food and produces neurotoxin, botulinum toxin that causes paralysis. 

Thus, the correct answer is 'Clostridium botulinum.'

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

When milk is heated at $62^o$C for $30$ minutes and then cooled, the process is called

  1. Sterilization

  2. Pasteurisation

  3. Nitrification

  4. Freezing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pasteurization is the process of sterilization. In this, packaged and non-packaged food items are heated at 62$^o$C for 30 minutes and then cooled. This is done in order to eliminate pathogens and extend the shelf-life of food. This process frees food materials from vegetative forms of all pathogenic bacteria. This method was introduced by Louis Pasteur.

Thus, the correct answer is 'Pasteurization.'

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

Pasteurisation frees food stuffs of

  1. All bacteria

  2. All living organisms

  3. Vegetative forms of bacteria

  4. Vegetative forms of all pathogenic bacteria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pasteuriziation is the process of sterilization. In this, packaged and non-packaged food stuffs are heated with mild heat, that is 60$^o$C to 70$^o$C for short duration in order to eliminate pathogens and extend shelf-life. This process frees food stuffs of vegetative forms of all pathogenic bacteria. The process was first developed by Louis Pasteur in 1864.

Thus, the correct answer is 'Vegetative forms of all pathogenic bacteria.'

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

Sterilization by autoclaving is carried out to

  1. Kill bacteria and other pathogens

  2. Kill viruses

  3. Kill bacteria and enzymes

  4. Inactive enzymes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sterilization by autoclaving is carried out to kill bacteria and other pathogens present in the food, equipment, and materials. In this, a pressurized steam is applied with the heat of 121$^0$C for around 15–20 minutes to kill bacteria, spores, and other pathogens.

Thus, the correct answer is 'Kill bacteria and other pathogens.'

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

Pasteurization is carried out at

  1. $30^o$C for $20$ minutes
  2. $40^o$C for $30$ minutes
  3. $30^o$C for $60$ minutes
  4. $62^o$C for $30$ minutes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The 'batch' or 'vat' method of pasteurization involves heating milk to 62 degrees Celsius (or 145 degrees Fahrenheit) for 30 minutes.

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

In pasteurisation, milk and liquors are _______________.

  1. Super cooled to kill germs

  2. Super heated to kill germs

  3. Heated below boiling point for several hours

  4. Heated well below boiling point for 20-30 minutes.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Answer is option D "Heated well below boiling point for 20-30 minutes"
Pasteurization process eliminates pathogens and increase shelf-life of milk and liquids. Vat pasteurization process heats milk and liquids below boiling temperature for 20-30 minutes and is used primarily in the dairy industry for preparing milk for making starter cultures in the processing of cheese, yogurt, buttermilk and for pasteurizing some ice cream mixes.
Multiple choice evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

Steaming of food may lead to___________.

  1. Change in colour

  2. Sterilization

  3. Preservation

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Steaming is a moist-heat cooking method that can help sterilize food surfaces and contribute to preservation by killing microorganisms, thereby extending the shelf life of the food.