Why is the use of aspartame limited to cold foods and soft drinks?

After watching a programme on TV about the adverse effects of junk food and soft drinks on the health of school children, Sonali, a student of Class XII, discussed the issue with the school principal. Principal immediately instructed the canteen contractor to replace the fast food with the fibre and vitamins rich food like sprouts, salad, fruits etc. This decision was welcomed by the parents and the students. 

After reading the above passage, answer the following questions:

(a) What value are expressed by Sonali and the Principal of the school?

(b) Give two examples of water-soluble vitamins.

193.

Which one of the following is a food preservative?  Equanil, Morphine, Sodium benzoate

Why is bithionol added to soap?

Which class of drugs is used in sleeping pills?

What are the following substances? Give one example of each one of them.

 (i) Tranquilizers

 (ii) Food preservatives

 (iii) Synthetic detergents

Describe the following giving one example for each: 

 (i) Detergents 

(ii) Food preservatives 

(iii) Antacids 

Seeing the growing cases of diabetes and depression among young children, Mr Lugani, the principal of on reputed school organised a seminar in which he invited parents and principals. They all resolved this issue by strictly banning junk food in schools and introducing healthy snacks and drinks like soup, lassi, milk, etc. in school canteens. They also decided to make compulsory half an hour of daily physical activities for the students in the morning assembly. After six months, Mr Lugani conducted the health survey is most of the schools and discovered a tremendous improvement in the health of the students.
After reading the above passage, answer the following questions:

(i) What are the values (at least two) displayed by Mr Lugani?
(ii) As a student, how can you spread awareness about this issue?
(iii) What are antidepressant drugs? Give an example.
(iv) Name the sweetening agent used in the preparation of sweets for a diabetic patient.

(i) What class of drug is Ranitidine?

(ii) If water contains dissolved Ca²⁺ ions, out of soaps and synthetic detergents, which will you use for cleaning clothes?

(iii) Which of the following is an antiseptic?

0.2% phenol, 1% phenol

What is the cause of a feeling of depression in human beings? Name a drug which can be useful in treating this depression.