Question

____
is
an
irreversible
change.



a.
Burning
of
coal



c.
Melting
of
wax



b.
Melting
of
ice


d.
Formation
of
ice​

Answer 1

Answer:

a) is a right Answer

but iam not sure

Answer 2

Answer:

a) Burning of coal

Explanation:

Burning of coal is an irreversible change.