Question

State whether the following statements are TRUE or FALSE. 1. Rusting and burning are physical changes. 2. Physical change is always an irreversible change. 3. The cutting of an apple is an irreversible chemical change. 4. Rusting can be prevented by applying a coat of paint on the surface. 5. Oxygen gas turns a solution of lime water milky. 6. The reaction between copper sulphate and iron observes a colour change from green to blue​

Answer 1

Answer:

2

1. False-- New products are formed like CO2 gas is released in burning and Iron oxide is formed on rusting
2. False--Cutting paper cannot be reversed
3. False--It is an irreversible physical change
4. True
5. False--CO2 gas turns a solution of lime water milky
6. False-- From blue to green

Answer 2

Answer:

1)False

2)False

3)False

4)True

5)False

6)False

Explanation:

3)cutting an apple is a physical change and an irreversible because in chemical reaction after reaction new compound is formed.

6)copper sulphate solution colour changes from blue to green.

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