Question

Classify the physical or chemical change
(a)Raising of hot air over a radiator.
(b)Burning of kerosene in a lantern.
(c)Change in colour of black teaon adding lemon on it.

Answer 1

a- physical change
b- chemical change
c- chemical change.

Hope it helps...

Answer 2

1)chemical change
2)chemical change
3)physical change