Tag: chemistry

Questions Related to chemistry

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.

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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.

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.

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

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.

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.

Crystallisation is used to purify :

chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

  1. solids

  2. liquids

  3. gases

  4. all of the above

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Correct Option: A
Explanation:

Crystallization is used to obtain pure solid from impure solid sample. It is used to purify solids.

The salt we get from sea water can have many impurities in it. These impurities can be removed by :

chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

  1. sedimentation

  2. crystallisation

  3. centrifugation

  4. all of the above

Show answer
Correct Option: B
Explanation:

Crystallisation is used to obtain pure solid from impure solid sample. It is used to purity solids, e.g., purification of salts that we get from sea.