Question

which of the following is/are examples for physical change. 1.melting of ice. 2.burning of sulphur 3.heating of zinc oxide 4. heating of lead oxide . Pease I want to know that fast​

Answer 1

Answer:

1. Melting of ice is physical change because when melted it changes to liquid state and again when we freeze it changes to solid state.

2. Burning of Sulphur is chemical change

3. Heating of Zinc oxide is physical change because when heated it turns to yellow colour and when cooled it turns back to white colour.

4. Heating of lead oxide is physical change because when heated it turns to brown colour and when cooled it turns back to yellow colour.

Answer 2

Answer:melting of ice

Explanation:Generally heating and burning produces new substances which indicates that it is chemical reaction. Melting of ice is physical change as it can be converted back to ice by physical methods