☆ give examples for the following.
Reversible changes ice cubes - water-water vapour
2 Joreversibile changes - scipping of fruits.
s physical change - cutting of an
opple.
4 chemical changes - susting of iron.
Answers
Answer:
water vapour,water,ice cubes
Answer:
1. Melting of ice is a physical change in which substance changes its physical state but not properties. Hence it is a reversible change in which melted ice can freeze again by decrease in temperature.
2. A change in which chemical composition and chemical properties of the reacting substances undergo a change is called a chemical change. During ripening of fruits or growing of plant into a tree, a chemical change occurs which helps in ripening and growing of plants into tree and cannot be reversed.
3. Cutting of an apple is both physical and chemical change . It is a physical change because by cutting an apple , the size and shape of an apple changes . It is a chemical change because after cutting an apple , the colour of an apple changes when it is left in open. Cutting a apple is a physical change
4. Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.