Tag: food spoilage and food preservation

Questions Related to food spoilage and food preservation

Which of the following statement is wrong about Abscisic acid :

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. It helps in general plant metabolism

  2. It is antagonistic to $GA _3$

  3. It helps in seed maturation & dormancy

  4. Morphogenesis

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Correct Option: A
Explanation:

It helps in general plant metabolism

Muddy water can be purified through coagulation by using :
evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. $\text{common slat}$

  2. $\text{alums}$

  3. $\text{sand}$

  4. $\text{lime}$

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Correct Option: B
Explanation:

Muddy water can be purified through coagulation by using alums. 


It is added to the water so that the negatively charged colloidal particles clump together into Flocks which then float to the top of the liquid settle to the bottom of the liquid, or can be more easily filtered from the liquid, prior to further filtration and disinfection of the water.

Which of the following will not enhance nutritional value of food?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Minerals

  2. Artificial sweeteners

  3. Vitamins

  4. Amino acids

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Correct Option: B
Explanation:

Artificial sweeteners enhance the taste but will not enhance the nutritional value. Whereas minerals, vitamins and amino acid will increase the nutritional value as they are the important constituents of nutrition.

Which of the following are used as food preservative?

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Table salt

  2. Sodium hydrogen carbonate

  3. Cane sugar

  4. Benzoic acid

Show answer
Correct Option: A,C
Explanation:
A preservative is a substance that is added to products such as foods, pharmaceuticals, paints, biological samples, wood, etc. to prevent  decomposition by microbial growth or by undesirable chemical changes.

Food preservation usually involves preventing the growth of bacteria,fungi (such as yest), or other microorganisms (although some methods work by introducing benign bacteria or fungi to the food), as well as retarding the oxidation of fats that cause rancidity.

The earliest cultures have used sugar as a preservative, and it was  commonplace to store fruit in honey. Similar to pickled foods, sugar cane was brought to Europe through the trade routes. In chemical pickling, the food is placed in an edible liquid that inhibits or kills bacteria and other micro-organisms. Typical pickling agents include  table salt.

Hence A & C are correct options.

Sugar is the main source of energy as it produces energy on metabolic decomposition. But these days low calorie drinks are more popular.

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. True

  2. False

  3. Ambiguous

  4. None of these

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Correct Option: A

Assertion: All chemical added to food items are called food preservatives.
Reason: All the chemicals increase the nutritive value of the food.

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

  2. Both Assertion and Reason are correct but Reason is NOT the correct explanation for Assertion.

  3. Both Assertion and Reason are incorrect.

  4. Assertion is correct but Reason is incorrect.

  5. Assertion is incorrect but Reason is correct.

Show answer
Correct Option: C
Explanation:

Various chemicals are added to food. They are called food additives and are flavours and sweeteners, food colours (dyes), fat emulsifiers and stablising agents, flour improvers antistaling agents and bleaches, antioxidants, preservatives and nutritional supplements.
Thus, only few chemicals added to food items are called food preservatives.
and Only few chemicals increase the nutritive value of the food.
Hence, both Assertion and Reason are incorrect.

Assertion : Preservatives are added to food items
Reason : Preservatives inhibit the growth of microorganisms

evs - i methods of preserving food food spoilage and food preservation chemicals in food food chemistry

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

  3. Both Assertion and Reason are incorrect

  4. Assertion is correct but Reason is incorrect

  5. Assertion is incorrect but Reason is correct

Show answer
Correct Option: A
Explanation:

A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.


Preservatives increase shelf life of food materials by inhibiting growth of micro organisms and that is the reason why they are added to food items. 

Assertion: Artificial sweeteners are added to the food to control the intake of calories.


Reason: Most of the artificial sweeteners are inert and do not metabolise in the body. 

Read the above assertion and reason and choose the correct option regarding it.

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

  3. Both Assertion and Reason are incorrect.

  4. Assertion is correct but Reason is incorrect.

  5. Assertion is incorrect but Reason is correct.

Show answer
Correct Option: A
Explanation:

Artificial sweeteners are added to the food to control the intake of calories.
Most of the artificial sweeteners are inert and do not metabolise in the body.

An example includes saccharine and its salts which are life savers for countless diabetics and is of great value to people who need to control the intake of calories.

Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

It is found in phosphorus and nitrogen

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. inorganic impurities

  2. bacteria

  3. nutrients

  4. other microbes

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Correct Option: C
Explanation:
Nitrogen and phosphorous are nutrints that are natural parts of aquatic ecosystems.Nitrogen is also most abundant element in the air we breath nitrogen and phosphorous support the growth of a lgee and aquatic plants,which prouide food and habbit for fish and smaller organisma that line in water.







Which of the following are artificial sweeteners?

chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

  1. Sodium benzoate

  2. Saccharin

  3. Galactose

  4. Aspartame

Show answer
Correct Option: B,D
Explanation:

For diabetic patients, sugar cannot be used as a sweetening agent. Artificial sweetening agents that are non-nutritive in nature are used as substituents for sugar (specially in soft drinks). 


Examples are saccharin (500 times sweeter than sucrose) and cyclamates. Aspartame (160 times sweeter than sucrose), another artificial sweetener is the methyl ester of the dipeptide aspartyl phenylalanine.

So, the correct options are B and D.