Question

(a) Differentiate between physical and chemical change.

(b) What is rusting?

(c) Is souring of milk a physical or chemical change? Why?​

Answer 1

Answer:

Explanation:

In iron rusting, iron oxide is formed, in gasoline burning water vapor and carbon dioxide is formed and in milk souring, sour tasting lactic acid is produced. Hence, these are chemical changes. Whereas in whipping of egg air is forced into the fluid but no new substance is produced. Hence, it is a physical change.

Answer 2

1

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

2

Be affected with rust .

3

So chemical changes require a change on a molecular level that cannot be reversed because they form some new substance. Souring milk is not something you can reverse, and the process of it souring produces new molecules .

PLEASE MARK ME AS BRAINLEIST AND FOLLOW ME FOR ANY QUERIES AND THANKS MY ALL ANSWERS ..