Q21 of 26 Page 1

(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?


(i) Disaccharide is a sugar in which two simple sugars are linked through glycosidic linkage.

Starch is a polysaccharide formed from glucose.


Maltose is a disaccharide formed by joining of two glucose molecules.


Fructose and glucose are monosaccharides (simple sugars).


(ii)



(iii) Deficiency of vitamin D causes bone deformation in children. Vitamin D is very important for absorption of calcium by bones.


More from this chapter

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19

Predict the products of the following reactions:

(i)


(ii)


(iii)


20

How do you convert the following:

(i) Phenol to anisole


(ii) Propan-2-ol to 2-methylpropan-2-ol


(iii) Aniline to phenol


OR


(a) Write the mechanism for the following reaction:



(b) Write the equation involved in the acetylation of Salicylic acid.


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.


 23

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?