(i) The values displayed by Mr. Chopra are:
(a) social awareness
(b) concern for students' health
(ii) Awareness can be spread by performing nukkad natak in the community, displaying posters, cartoons, and slogans, and by conducting seminars.
(iii) Antidepressant drugs have lots of side effects like indigestion, headache, stomach aches, drowsiness, weight gain, etc. That is why they should not be taken without consulting a doctor.
(iv) Examples of artificial sweeteners are aspartame, saccharin, sucralose, etc.