Question

Which of the following is an irreversible change
a) A toy aeroplane made by folding paper
b) A roti
c) A balloon change its size and shape on blowing air into it.
d) Melting of wax

Answer 1

Answer:

b) Roti

Explanation:

You cannot make roti into dough again

Answer 2

B) A roti
And
D) melting if wax

Are irreversible changes…
Hope, it’s helpful