SSC IB Security Assistant & MTS Mock Test Series 2023 General Science Chemistry Basic Concepts of Chemistry
Which of the following sets comprises only Chemical changes ?
1
Boiling of oil, breaking of mug, burning of paper
2
Dissolving copper suphate in water, digestion of food, cutting of paper
3
Breaking of egg, boiling salt water, mixing ink in water
4
Rusting of iron, burning of paper, cooking of food