Question

1. ____________ substances having different properties are formed during a chemical change.
2. If we add two drops of dilute sulphuric acid to 1 g of copper sulphate powder and then this mixture is dissolved in small amount of hot water. On cooling this solution, we get blue coloured crystals. These two steps are :
(a) both physical change
(b) chemical and physical changes respectively
(c) physical and chemical change respectively
(d) both chemical change​
3. The process of crystalization involves cooling of a ____________ solution

Answer 1

Answer:

Explanation:

Correct option is (C).

Dissolution of copper sulphate powder in water in presence of sulphuric acid is a physical change. On cooling this hot solution, cystals of copper sulphate separate out, which is also a physical change.