Q23 of 26 Page 1

Mr.Roy, the principal of one reputed school organised a seminar in which he invited parents and principals to discuss the serious issue of diabetes and depression in students. They also resolved this issue by strictly banning the junk foods in school 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 activity 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.

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?


(i) *Responsible: Mr Roy took the responsibility to organise the seminar

*Caring: He took the responsibility because he cared for his students fitness.


(ii) As a student we can you spread awareness about this issue by conducting group discussions on the pros and cons of junk food, through seminars, workshops, making students do projects on this topic and displaying them.


(iii) Tranquilizers are a class of organic compounds that are neurologically active drugs. When consumed they bring about a sense of well being. When taken without prescription can lead to addiction. They are used to treat stress, anxiety, mental diseases and irritability. Eg: Valium, Haldol.


(iv) Aspartame is an artificial sweetener much sweeter than sugar. It is stable at low pH and low temperatures, hence used in cool drinks and frozen foods.


More from this chapter

All 26 →
21

(i) Which of the following is a disaccharide: starch, maltose, fructose, glucose?

(ii) What is the difference between fibrous protein and globular protein?


(iii) Write the name of vitamin whose deficiency causes bone deformation in children?


 22

Give reasons:

(a) n-Butyl bromide has higher boiling point than t-Butylbromide.


(b) Racemic mixture is optically inactive.


(c) The presence of nitro(-NO2) at o/p positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.


 24

(a) Account the following:

(i) Acidic character increases from HF to HI.


(ii) There is large difference between the melting and boiling point of oxygen and sulphur.


(iii) Nitrogen does not form pentahalide.


(b) Draw the structures of the following:


(i) ClF3 : it has a bent –T shape


(ii) XeF4 : it has square planar geometry.


OR


(i) Which allotrope of phosphorus is more reactive and why?


(ii) How the supersonic jet aeroplanes are responsible for depletion of ozone layers?


(iii) F2 has lower bond dissociation enthalpy than Cl2. Why?


(iv) Which noble gas is used in filling balloons for meteorological observations?


(v) Complete the equation:



 25

An aromatic compound ‘A’ of molecular formula C7H7ON undergoes a series of reactions as shown below. Write the structure of A,B,C,D and E in the following reactions:


OR


(a) Write the structures of main products when aniline reacts with the following reagents:


(i) Br2 water


(ii) HCl


(iii) (CH3CO)2O/pyridine


(b) Arrange the following in the increasing order of their boiling point:


C2H5NH2 , C2H5OH, (CH3)3N


(c) Give a simple chemical test to distinguish between the following pair of compounds:


(CH3)2NH, (CH3)3N