Q22 of 26 Page 1

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

(ii) What is the difference between native protein and denatured protein.


(iii) Write the name of vitamin responsible for the coagulation of blood.


(i) Starch is a polysaccharide made up of poly units of glucose.


(ii) A protein with an unique 3D structure present inside a biological system is known as native protein. But when native protein is subjected to physical and chemical changes, its structure get disturbed and it loses its biological activity and becomes a denatured protein.


(iii) Vitamin K is responsible for the coagulation of Blood.


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20

Predict the product of following reaction.

(i)


(ii) C6H5-CH2-CH3 ?


(iii) CH3COOH ?


 21

Write the names and structures of the monomers of the following polymer units:

(i) Nylon-6


(ii) Novolac


(iii) Buna-S


 23

Seeing the growing cases of diabetes and depression among young children, Mr. Lugani, the principal of one reputed school organized 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 in 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.


 24

(a) Illustrate the following reactions giving suitable example in each case:

(i) Hoffman Bromide Degradation reaction.


(ii)Diazotization


(iii) Gabriel Phthaliamide Synthesis


(b) Distinguish between the following pair of compounds:


(i)Aniline and N-methylaniline


(ii) (CH3)2NH and (CH3)3N


OR


(a) write the structures of main products when benzene diazonium chloride (C6H5N2+Cl-) reacts with the following reagents


(i) CuCN/KCN


(ii) H2O


(iii) CH3CH2OH


(b) Arrange the following:


(i) C2H5NH2, C2H5OH, (CH3)3N – in the increasing order of their boiling point.


(ii) Aniline, p-nitroaniline, p-methylaniline-in the increasing order of their basic strength.