Question

8. Classify the following into physical and chemical changes.
(a) The melting of ice
(b) Respiration
( The cooking of food
(d) Fermentation
(e) The evaporation of a liquid
(f) The sublimation of iodine
(g) The dissolving of a solid
(h) The burning of coal
(1) The glowing of a bulb
(1) The freezing of water
(k) The curdling of milk
(1) Photosynthesis in green plants
(m) The condensation of water vapour
(n) The digestion of food​

Answer 1

a.physical change
b.physical change
c.chemical change
d.chemical
e.chemical
f.chemical
g.chemical
h. chemical
i.physical
j.physical
k.chemical
l.chemical
m.chemical
n.chemical