Tag: food spoilage and food preservation

Questions Related to food spoilage and food preservation

Which of the following is/are examples of artificial sweetener?

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

  1. Sucralose

  2. Saccharin

  3. Neotame

  4. Aspartame

Show answer
Correct Option: A,B,C,D
Explanation:

Artificial sweeteners are used in one of two ways. They may be used directly in commercially processed foods, or they are mixed with one or more starch-based sweeteners before sale to consumers. Artificial sweeteners are so intensely sweet that dextrose or maltodextrin, or both, must be added to dilute their intense sweetness in order to imitate the sweetness of a sugar. Artificial sweeteners can not be sold directly to consumers since only infinitesimally small amounts are required to mimic sugar’s sweet taste. All of the given compounds are artificial sweeteners.

The food is kept at low temperatures in a refrigerator because it:

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

  1. saves money

  2. makes food more tastier

  3. kills bacteria present in the food

  4. is fashionable to keep the food in the refrigerator

Show answer
Correct Option: C
Explanation:

Bacteria do not grow at low-temperatures. So, food is stored at low-temperatures in refrigerator.

Vitamin C is:

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

  1. Citric acid

  2. Lactic acid

  3. Paracetamol

  4. Ascorbic acid

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Correct Option: D


(iii) Which class of drugs is used in sleeping pills?

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

  1. tranquilizers

  2. Antacid

  3. Disprine

  4. Paracetamol

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Correct Option: A
Explanation:

A tranquilliser :- refers to a drug which is designed for the treatment of anxiety, fear, tension, agitation, and disturbances of the mind, specifically to reduce states of anxiety and tension. 


It is also used in Sleeping pills.

On treating roll sulphur with an aqueous solution of calcium hydroxide :

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

  1. plastic sulphur is prepared

  2. milk of sulphur is prepared

  3. rhombic sulphur is prepared

  4. roll sulphur

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Correct Option: B
Explanation:

When sublimed sulfur is boiled with lime water ,the lime is removed from the precipitate by washing with dil. $ HCl $; this is known as milk of sulphur and is used for treatment of various skin orders.

The yellow in egg yolk is a coloring caused by:

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

  1. An FD & C dye added to the egg.

  2. A carotenoid

  3. An anthocyanin

  4. Natural means..the fat is just yellow.

Show answer
Correct Option: B
Explanation:

The yellow in egg yolk is a coloring due to the presence of carotenoid.
Hence option B is correct.

Some scientists believe that a chemical widely used as a preservative and a colouring agent in foods gets converted to an acid in the stomach, affects the genes and causes cancer in human beings. Identify that substance.

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

  1. Ferric chloride

  2. Sodium nitrite

  3. Vinegar

  4. Sulphur dioxide

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Correct Option: B
Explanation:

Sodium nitrite and nitrate closely are related chemicals that have been used for centuries to preserve meat. While nitrate itself is harmless, it easily converts to nitrite, which when combined with secondary-amine compounds forms nitrosamines, a powerful cancer-exacerbating chemical. This chemical reaction occurs easily during the frying process.


Salt is used in our food because:

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

  1. it makes the food tasty

  2. we sweat and lose salt

  3. it helps in production of hydrochloric acid required to digest the food

  4. it makes water absorb food particles better

Show answer
Correct Option: A
Explanation:

It balances the sweetness and helps suppress other flavors, such as bitterness. Salt contains the element sodium, which is an essential nutrient need by the body in Small amounts. When salt is added to processed meats, it restructures the proteins, which then act as binding and emulsifying agents.

Which of the following is used as a food preservative?

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

  1. Citric acid

  2. Sucralose

  3. Salts of sorbic acid

  4. Ascorbic acid

Show answer
Correct Option: A,C,D
Explanation:
Citric acid is used both as a natural flavor enhancer and preservative in a variety of foods, such as jams and jellies, canned fruits and vegetables. It's also used in ice cream, fruit drinks, candy, and carbonated beverages.
Sucralose is an artificial sweetener and sugar substitute.
Sorbic acid and its salts, such as sodium sorbate, potassium sorbate, and calcium sorbate, are antimicrobial agents often used as preservatives in food and drinks to prevent the growth of mold, yeast, and fungi. In general the salts are preferred over the acid form because they are more soluble in water, but the active form is the acid.
Ascorbic acid is a popular natural ingredient preservative. It can be used as a preservative in a vast array of food products, including bread, cured meats, jams and jellies, and other sauces and spreads.
therefore option A, C and D are correct

Modern oil-based paints contain oils that can dry to form strong, adhesive films by cross-linking of fatty acid chains. Some of these drying oils' are mentioned here. Can you pick the false one?

chemistry petrochemicals and polymers food spoilage and food preservation methods of preserving food chemicals in food

  1. Linseed oil

  2. Turpentine oil

  3. Soyabean

  4. Castor oil

Show answer
Correct Option: B
Explanation:

Drying oils are prone to hardening upon exposure to air, due to free radical base polymerization, thus forming a flexible, transparent and waterproof film. This property is exhibited by linseed, turpentine and soybean oils.