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Questions Related to evs

Which of the following is used as chemical preservatives ?

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

  1. Citric acid

  2. Nitric acid

  3. Oxalic acid

  4. All of the above

Show answer
Correct Option: A
Explanation:

Citric acid and phosphoric acid are added to carbonated beverages and fruit drinks for both flavoring and preservation. Nitric acid and Oxalic acid are much acidic in nature which can cause harm to the digestion system.

Why salts and edible oils are known as preservatives ?

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

  1. Because they can kill all microbes even the viruses

  2. They checks the growth of microbes

  3. They are tasty

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Salts and edible oils are the common chemicals generally used to check the growth of microorganisms. Therefore they are called preservatives.

Mark the correct statement:
a) Pasteurized milk can be consumed without boiling as it is free from harmful microbes
b) The milk is heated to about $700^{\circ}C$ for $15$ to $30$ seconds and then suddenly chilled and stored
c) Pasteurization prevents the growth of microbes

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

  1. a, b

  2. b, c

  3. a, c

  4. All of the above

Show answer
Correct Option: D
Explanation:

Pasteurized milk can be consumed without boiling as it is free from harmful microbes. The milk is heated to about $700C$ for $15$ to $30$ seconds and then suddenly chilled and stored. By doing so, it prevents the growth of microbes. This process was discovered by Louis Pasteur. So, It is called pasteurization.

Purpose of milk pasteurization

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

  1. Strips bacteria of oxygen

  2. Make the milk tasty for drinking

  3. Destroy microbes

  4. All of the above

Show answer
Correct Option: C
Explanation:

Milk is pasteurized to destroy microbes, but many more heat resistant organisms are only reduced in number. Pasteurization kills the harmful microorganisms present in milk..

Mark the incorrect statement

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

  1. Salts and edible oils are the common chemicals generally used to check the growth of viruses.

  2. We add salt or acid preservatives to pickles to prevent the attack of microbes.

  3. Sodium benzoate and sodium metabisulphite are common chemical preservatives.

  4. All of the above

Show answer
Correct Option: A
Explanation:

Salts and edible oils are the common chemicals generally used to check the growth of microorganisms. Therefore, they are called  preservatives. We add salt or acid preservatives to pickles to prevent the attack of microbes. Sodium benzoate and sodium metabisulphite are common preservatives. These are also used in the jams and squashes to check their spoilage.

Which of the following causes food poisoning ?

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

  1. Aspergillus

  2. Rhizopus

  3. Xanthomaonas

  4. All of the above

Show answer
Correct Option: A
Explanation:

The symptoms of food poisoning arise due to the presence of bacteria or other microbes in food and due to the ingestion of toxins contained in food. Some bacteria like Clostridium and Staphylococci and fungi like Aspergillus cause food poisoning.

Food poisoning could be due to the consumption of ________

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

  1. Spicy food

  2. Food spoilt by some microorganisms

  3. Heavy diet

  4. All of the above

Show answer
Correct Option: B
Explanation:

Microbes can make the food poisonous causing serious illness and even death. So, it is very important that we preserve food to prevent it from being spoilt. Microorganisms that grow on our food sometimes produce toxic substances.

Which of the following bacteria can cause food poisoning?


a) Clostridium
b) Staphylococci
c) Aspergillus

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

  1. a, b

  2. a, c

  3. b, c

  4. All of the above

Show answer
Correct Option: D
Explanation:

The symptoms arise due to the presence of bacteria or other microbes in good due to ingestion of toxins contained in food. Some bacteria like Clostridium and Staphylococci and fungi like Aspergillus cause food poisoning.

Which of the following is symptom of food poisoning?


a) Vomiting b) Nausea c) Dehydration d) Headache

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

  1. a, b, c

  2. a, b, d

  3. a, c, d

  4. All of the above

Show answer
Correct Option: A
Explanation:

Symptoms of food poisoning are vomiting, nausea, severe pain in abdominal region, diarrhoea and dehydration. It may also cause weakness, fatigue and damage to the nervous system.

Disease resulting from the consumption of contaminated food is ________________.

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

  1. Food adulteration

  2. Food poisoning

  3. Rancidity

  4. All of the above

Show answer
Correct Option: B
Explanation:

Food poisoning as the name suggests is a disease that results from the consumption of contaminated food. Food adulteration means the presence of unwanted materials in the food item which alters the quality of food whereas rancidity means degradation of oil and fats present in the food item.