NEET Questions Solved


Which is correct about saccharin?

(b) It is 550 times sweeter than sugar
(c) It is used as sweetening agent
(d) All of the above

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

(d)

All are characteristics of saccharin.

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NEET - 2014

Artificial sweetener which is stable under cold conditions only is

(a) saccharine                      (b) sucralose

(c) aspartame                      (d) alitame

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

Aspartame is the only artificial sweetener which is stable at lower temeperature temperature and decomposes at higher temperature.

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Mr. Roy, the principal of one reputed school organized a seminar in which he invited parents and principals to discuss the serious issue of diabetes and depression in students. They all resolved this issue by strictly banning the junk food in schools and to introduce healthy snacks and drinks like soup, lassi, milk etc. in school canteens. They also decided to make compulsory half an hour physical activities for the students in the morning assembly daily. After six months, Mr. Roy conducted the health survey in most of the schools and discovered a tremendous improvement in the health of students.                           (4 marks)

After reading the above passage, answer the following :

(i)   What are the values (at least two) displayed by Mr. Roy ?

(ii)   As a student, how can you spread awareness about this issue ?

(iii)  What are tranquilizers ? Give an example.

(iv)  Why is use of aspartame limited to cold foods and drinks ?

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

(i) Concern for students health, Application of knowledge of chemistry to daily life, empathy , caring or

     any other                           12+12 marks

(ii) Through posters, nukkad natak in community, social media, play in assembly or any other                          (1 marks)

(iii)Tranquilizers are drugs used for treatment of stress or mild and severe mental disorders .. Eg:

      equanil (or any other suitable example)                           12+12 marks

(iv) Aspartame is unstable at cooking temperature.                                                    (1 marks)

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Why do we require artificial sweetening agents ?           (1 marks)

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

To reduce calorie intake and to protect teeth from decaying, we need artificial sweeteners.

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What are the following substances ? Give one example of each one of them.           (3 marks)

 (i) Tranquilizers

 (ii) Food preservatives

(iii) Synthetic detergents

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

 (i) Tranquilizers : Tranquilizers are chemical compounds used for the treatment of stress and

      mild or even severe mental diseases.

      Example : Equanil, meprobamate, veronal.

 

 (ii) Food preservatives : Food preservatives are the compounds which prevent spoilage of food

       due to microbial growth.

       Example : Sodium benzoate, table salt, vegetable oils etc.

 

(iii) Synthetic detergents : Synthetic detergents are cleansing agents which have all the pro-

      perties of soap but which actually do not contain any soap.

      Example : Sodium lauryl sulphate.

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(a) Which one of the following is a food preservative ?                                             (3 marks)

      Equanil, Morphine, Sodium benzoate          

(b) Why is bithional added to soap ?

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

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

(a) Sodium Benzoate : It is a food preservative.

 

(b) Bithional acts as deodorant in soaps, hence it works as an antiseptic agent and reduces the

     odours produced by bacterial decomposition of organic matter on the skin.

 

(c) Tranquilizers like barbiturates are used in sleeping pills.   

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 (i) Name the sweetening agent used in the preparation of sweets for a diabetic patient.  (3 marks)

 (ii) What are antibiotics ? Give an example.

(iii) Give two examples of macromolecules that are chosen as drug targets.

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

 (i) Saccharin is used for a diabetic patient for preparation of sweets.

 

 (ii) Antibiotics : Those chemical substances which are produced completely or partially by

      chemical synthesis in low concentration and either kill or inhibit the growth of microorganisms

      by intervening in their metabolic processes, are known as antibiotics.

      Examples :

      Tetracycline  Bacteriostatic antibiotics,

      Penicillin  Bactericidal antibiotics

 

(iii) Carbohydrates, proteins, nucleic acid etc.

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What are the following ? Give one example of each.                         (3 marks)

 (i) Sweetening agents

 (ii) Food preservatives

(iii) Antibiotics

Concept Videos :-

#9 | Artificial Sweetening Agents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants

 (i) Sweetening agents : Those chemical substances which are sweet in taste but do not add any

      calories to our body are called artificial sweetening agents. These are excreted as such through

      urine.

      Example : Saccharin, aspartame etc.

 

 (ii) Food preservatives : They are used to prevent spoilage of food due to microbial growth.

      Example : Table salt, vegetable oils, sodium benzoate etc.

 

(iii) Antibiotics : Those chemical substances which are produced completely or partially by

      chemical synthesis in low concentration and either kill or inhibit the growth of microorganisms

      by intervening in their metabolic processes, are known as antibiotics.

      Examples : Tetracycline, Vancomycin.

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What are biodegradable and non-biodegradable detergents ? Give one example of each.  (3 marks)

Concept Videos :-

#9 | Artificial Sweetening Agents
#11 | Synthetic Detergents

Concept Questions :-

Food - preservations, artificial sweetening agents,antioxidants
Cleansing agents - soaps and detergents, cleansing action/Dyes/Propellant

Biodegradable detergents : Detergents, having straight hydrocarbon chains are easily degraded or decomposed by micro-organism, are known as biodegradable detergents.

Example : Sodium lauryl sulphate.

Non-biodegradable detergents : Detergents containing branched hydrocarbon chains and are not easily decomposed by the micro-organisms, are known as non-biodegradable detergents.

Example : Sodium 4- (1, 3, 5, 7-tetramethyloctyl) benzene sulphonate.

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