Question

what type of change is permanent and not easily reversible?​

Answer 1

Explanation:

a physical change is a temporary and reversible change in which the physical properties of the substance changes without alternating the composition of the chemical change is a permanent not easy city of the subjected to produce one or more substances

Answer 2

Answer- The above question is from the chapter 'Physical and Chemical Changes'.

Question: What type of change is permanent and not easily reversible?​

Answer: Chemical change is permanent and not easy reversible.

Reasons:

1) The chemical changes involve the formation of new products.

2) Heat and light are evolved.

3) There is a change in odour.

4) There is a change in colour.

5) Usually, a gas is formed.

Examples: Curdling of milk, burning of wax, burning of coal, making of chapatti, etc.