Question

state whether each of these is a physical or chemical change:
a) burning of coal __________
b)formation of curd from milk ____
c) mixing sand and water _________-
d) bursting of a firecracker _______

Answer 1

Answer:

a) Chemical change

b)Chemical change

c)Physical change

d)Chemical change

Answer 2

A. Burning of coal chemical change.

B. Formation of curd from milk chemical change.

C. Mixing sand and water physical change.

D. Busting of a firecrackers chemical change.

hope it helps...