CBSE Class 12 Chemistry 2019 Delhi Set 3 Solved Paper

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Question : 9
Total: 9
Define the following with a suitable example in each.
(i) Oligosaccharides
(ii) Denaturation of protein
(iii) Vitamins
OR
Write the reactions involved when D-glucose is treated with the following reagents:
(i) Br2 water
(ii) H2NOH
(iii) (CH3CO)2O
Solution:  
(i) Carbohydrates that yield two to ten monosaccharide units, on hydrolysis, are called oligosaccharides. Example- Sucrose or any other.
(ii) When a protein in its native form, is subjected to physical change like change in temperature or chemical change like change in mathrmpH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. ExampleBoiling of egg.
(iii) Organic compounds required in the diet in small amounts to perform specific biological functions for normal maintenance of optimum growth and health of the organism. Example - Vitamin A
OR
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