LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
SUPPLEMENTARY SEMESTER EXAMINATION – JUN 2006
B.Sc. DEGREE EXAMINATION
CH 6650 – FOOD CHEMISTRY
Date & Time : 28/062006/1.00 – 4.00 Dept. No. Max. : 100 Marks
Part – A
Answer ALL the questions. (10 x 2 = 20)
- Mention the factors causing temporary and permanent hardness to water.
- What is alkaline phosphatase test?
- What are whey proteins? Mention any two.
- What are food preservatives? Name any two inorganic preservatives.
- What is sensory evaluation of food quality?
- What is inversion of cane sugar?
- How is fructosazone prepared from fructose?
- Define RM value.
- What is smoke point of oils and fats?
- Draw the structure of amylose.
Part – B
Answer any EIGHT questions only. (8 x 5 = 40)
- Explain the pasteurization of milk with its types. Discuss the effects of pasteurization on milk.
- Explain the following: a. Low sodium milk b. skimmed milk c. Sweetened milk.
- Explain ion exchange method for the purification of water.
- Write an account of the changes in meat during cooking and processing.
- Describe the commercial heat preservation techniques.
- What are food additives? Mention their legitimate uses.
- Write a short note on food colourants.
- What is rancidity? Explain the different kinds of rancidity.
- Discuss the open and cyclic structure of glucose.
- What are saturated and unsaturated fatty acids? Explain with an example.
- Explain the terms dextrinization and syneresis.
- What are the medicinal uses of chocolates?
Part – C
Answer any EIGHT questions only. (4 x 10 = 40)
- Write a short note on carbohydrates, lipids, vitamins and enzymes present in milk.
- What is reverse osmosis? Explain this method to treat brackish water.
- Write a note on spurious colourants.
- What is hazard analysis? How is it important in food processing?
- How is sucrose manufactured from sugar cane?
- Discuss the digestion and metabolism of carbohydrates.
- Write a note on chemical composition of tea.
- Explain different types of fruit beverages with an example.