Question 1 Name food material which are preserved by mustard and vinegar? Question 2 Name food material which are preserved by using chemicals as preservatives? Question 3 Name food material which are preserved by pasteurisation? Question 4 Name food material which are preserved in air-tight packets? Question 5 Name some preservatives which are used in the … [Read more...] about Preservation of Food by Mustard oil and Vinegar, Chemicals, Pasteurisation, Air-tight packets