Tag: evs

Questions Related to evs

All living organisms are killed by heat treatment known as_____________

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

  1. Pasteurisation

  2. Immunity

  3. Sterilisation

  4. Autoimmunity

Show answer
Correct Option: C
Explanation:
Sterilisation is a technique to prolong the shelf life of foods. In general the food products are heated to 110 to 135°C for about 15 to 20 minutes. For some canned products they are heated for up to one hour. All micro-organisms are killed during this process. After sterilisation the product is free of germs and, if stored correctly, have a shelf life of several years. Heat-sensitive vitamins are destroyed for the benefit of a long shelf life. Taste and colour of the food are also affected by the heat. Sterilisation is used for foods like meat, poultry, vegetables, fruits and milk. 
Therefore, the correct answer is option C.

Which of the following rot completely and do not smell ?

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

  1. Left over food

  2. Broken glass

  3. Aluminium wrapper

  4. Polythene bags

Show answer
Correct Option: A
Explanation:

The correct answer is 'leftover food'

For anything to rot completely, the microorganisms present in the environment should be able to breakdown the material by the use of their enzymes. Leftover food is easily degraded by these enzymes whereas broken glass, aluminium wrappers and polythene bags don't rot because these enzymes cannot degrade them(or the enzyme action on these substances is so slow that rotting is insignificant)
So the correct option is A.

Mark the statement which is not true for sugar as preservative

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

  1. Sugar inhibits the growth of bacteria

  2. It protects the food from spoilage

  3. Squashes can't be prepared by sugar

  4. All of the above

Show answer
Correct Option: C
Explanation:

Jams, jellies and squashes are preserved by sugar. Sugar reduces moisture content and inhibits the growth of bacteria.

In Pasteurization, the milk is heated for

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

  1. $30-60 secs$

  2. $1-5 min$

  3. $15-30 sec$

  4. $1-2 sec$

Show answer
Correct Option: C

Use of oil and vinegar in pickles

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

  1. Prevents spoilage of pickles

  2. Prevents growth of bacteria

  3. Kills the algae

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment.

Mark the correct statement

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

  1. Sugar inhibits the growth of bacteria which enhances the activity of enzymes

  2. Sugar inhibits the growth of microbes which inhibits the growth of bacteria that spoil food

  3. Sugar reduces the rate of enzyme activity

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Jams, jellies, squashes are preserved by sugar. Sugar reduces the moisture content which inhibits the growth of bacteria which spoils food.

Pasteurized milk can be consumed without boiling why?

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

  1. As it is free from enzymes

  2. As it is free from microbes

  3. As it is free from preservatives

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Pasteurized milk can be consumed without boiling as it free from harmful microbes. The process was discovered by Louis Pasteur.

Oil and vinegar is used for preservation for

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

  1. Vegetables

  2. Fish

  3. Meat

  4. All of the above

Show answer
Correct Option: D
Explanation:

Vegetables, fruits, fish and meat are often preserved by this method. It prevents the growth of bacteria.

Match the columns

a) Aspergillus 1) Chemical preservative
b) KMS 2) Acetic acid
c) Vinegar 3) Food poisoning
evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. $a-1,b-2,c-3$

  2. $a-2,b-1,c-3$

  3. $a-3,b-1,c-2$

  4. $a-1,b-3,c-2$

Show answer
Correct Option: C
Explanation:
  • Aspergillus causes food poisoning.
  • KMS(Potassium Mera Bisulphate) is a chemical preservative.
  • Acetic acid in the form of vinegar is used in the manufacture of several pickled products.

Common preservative used in jam and pickles is ________

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

  1. Sodium benzoate

  2. Nitric acid

  3. Sodium chloride

  4. Copper sulphate

Show answer
Correct Option: A
Explanation:

There are many chemical preservatives used in food industry. Sodium benzoate is generally used is ketchups, pickles, jams etc.