Question

fill in the blanks...
i) most chemical changes are.......... whereas most physical changes are...........
ii)mixing of iron and sulphur is a .......... change whereas heating of iron and sulphur is a .......... change.
iii).......... is formed when magnesium oxide is dissolved in water.
iv) rusting of iron is a .......... change whereas boiling of milk is a ........... change.
v) carbon dioxide gas turns limewater .............. A .......... change takes place.​

Answer 1

Answer:

Reversible ;irreversible

Reversible , irreversible

Magnesium oxide

Chemical, physical

Milky, physical

Answer 2

1.permanant ( irreversible);permanent (reversible

2.reversible change(physical);irreversible change(chemical)

3.magnesium hydroxide

4.chemical change ; physical change

5.milky;chemical change