state gov DDA Junior Secretariat Assistant (JSA) Mock Test 2023 General Science Chemistry Chemical Reaction
From the following, identify the set with only physical changes :
1
Rusting of iron, melting of ice cream, freezing of wax
2
Freezing of ice cream, melting of chocolate, dissolving of candy
3
Cooking of food, boiling of oil, pounding a herb
4
Rusting of iron, burning of paper, digestion of food