Question

. State whether true or false with a reason:
1)A physical change involves the change in state of matter and is always reversible.
2)In a chemical change, the substance after the change cannot come back to its original state even when the cause of change is withdrawn
3)An endothermic reaction involves the release of heat.
4)Magnesium loses its mass when it is burnt in oxygen.
5)Rusting of iron can be prevented my forming alloys such as stainlesssteel.

Answer 1

Answer:

true

false

false

true

true

Answer 2

Answer:

1. True

2. True

3. False

4. True

5. True