Question

B. State whether 'true' or 'false'.
1. Coating a layer of zinc over iron is
galvanization. T
2. Souring of milk is a physical change. F
3. Marine water expedites the rusting of iron
in ships.
4. Burning of a wax candle is a physical change.
5. Iron nail gets coated with
copper when
placed in a solution of copper sulphate.
6. Iron gets rusted in moist air.
7. Digestion of food is a physical change.
8. Crystallization helps in obtaining pure and
clean substance.
9. Burning of a wax candle is a physical
change.​

Answer 1

Answer:

7

Explanation:

crystallization helps in obtaining pure and clean sbstances

Answer 2

Answer:

1. true

2. false

3.true

4. true

5.true

6.true

7.false

8.true

9.true