Question

Q1) What is rust?
Q2)What is chemical change?
Q3) Write the chemical formula of blue vitriol?

Answer 1

Heya...

Ans1) When iron oxide is hydrated, it is known as Rust (Fe203.XH2O).

Ans2) A change in which a new substance with different properties is formed is known as chemical change.

Ans3) Crystals of copper sulphate pent hydrate (CuSO4.5H2O) are blue in colour. So, it is commonly known as blue vitriol.

hope it helps...