Question

4. Very short answer type questions.
(a) give an example of a physical change?
(b) what type of change is digestion of food?
(c) what is formed when vinegar is added to baking soda?
(d) what are two conditions essential for the rusting of iron?
(e) What is stainless steel made up of?​

Answer 1

Answer:

1. melting of ice
2. chemical change
3. Baking soda is sodium hydrogen carbonate and vinegar contains acetic acid. So, when baking soda and vinegar are mixed together, then a chemical change takes place between sodium hydrogen carbonate and acetic acid to form three new substances : sodium acetate, carbon dioxide and water
4. it should not be painted and it should be kept in open area
5. fake iron

Answer 2

Answer:

physical change is stretching of rubber band