Question

1. state the difference between physical and chemical change with example.
2. explain why burning of wood and cutting in into small pieces are considered as two different type of change.
3. describe how crystal of copper sulphate are prepared.
4. what is rusting? explain how painting of an iron gate prevent in from rusting.
5. classify and explain the following into hell physical or chemical change.
(a) Dissolving sugar in water
(b) burning of coal
(c) melting of wax



please give me all answers​

Answer 1

Answer:

Physical change : The change in which the molecules present in the substance remain the same but the shape ,size or position of substance changes ...

Chemical change : The change that occur as a result of a chemical reaction between the molecules of substance and in which a new substance is formed ...

I only know this idk how to explain other questions to u so sorry

Answer 2

physical change-the change in which the molecules present in the substance remains the same but shape size and position of substance change.

chemical change the change that occurs as a result of a chemical reaction between the moles of the substance and in which a new substance is formed .

The burning of wood leads to the formation of new substance like as carbon dioxide gas water vapour heat and light distance is irreversible and hence a chemical change while cutting wood into smaller no change in the original composition of would also no new substances are formed