Question

assify each of the following as physical or chemic change 1.drying if a shirt in the sun 2. rising kf hot aur over a radiator 3.burning of kerosene in a lantern 4.change in colour of black tea on adding lemon to it

Answer 1

1.physical change.
2.chemical change
3.chemical change
4.chemical change

Answer 2

1. It is a physical change because shape or form of the object is not changed. It is reversible.
2. It is also a physical change because hence no new substance is formed.
3. It is a chemical change because we get a chemical compound and It is irreversible.
4. It is chemical change because the colour is changing due to acidic base. It is irreversible