Question

which of the following are are chemical changes?

a> mixing of iron fillings and sand
b> growth of plant
c> rusting of iron
d> freezing of watet

Answer 1

c rusting of iron is chemical change

Answer 2

Hey friend !!

Here is your answer.

The chemical changes are :

B. Growth of plant

C. Rusting of iron.

This is because their chemical composition gets changed while in 1st and 4th option , the chemical composition remains the same.

Hope it helps.

#pragya_singh