Question

which of the following is a physical change (a) melting of butter (b) rusting of iron (c) burning of paper (d) changing of wheat to bread​

Answer 1

Answer:

burning of paper

Explanation:

I think it's burning of paper

Answer 2

Answer:

changing of wheat to bread

Explanation:

Rusting of iron is a redox reaction and its a chemical change, apart from this all others are physical changes.

The rusting of Iron (Iron in contact with water forms the anode and in contact with air forms the cathode. At the anode iron is oxidised to Fe

2+

and at the cathode oxygen is reduced to water