C. Fill in the blanks with suitable words:
1. The reddish brown layer deposited on the surface of iron objects is called_________
2. A__________
change is also called a chemical reaction.
3. The chemical formula of magnesium oxide is__________
4. Melting of wax is a__________
change.
5. A change that cannot be reversed is called___________
change.
6. Growth of a plant is a_________
change.
7. Energy is__________
in chemical changes.
8. Photosynthesis in plants is a________
change.
9. Magnetisation of an iron piece is a___________
change.
10. Changes in which only___________
properties of a substance change are called physical changes.
11. The chemical name of baking soda is____________
12. When carbon dioxide is passed through limewater, it turns milky due to the formation of__________
13. Two methods by which rusting of iron can be prevented are________
and________
Answers
Answered by
1
Answer:
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Answered by
10
Explanation:
1.Rust
2.Chemical Change
3.MgO
4.Physical
5.Irreversible Change
6.Physical
7.Released
8.Chemical Reaction
9.Magnetic Force
10.Physical
11.NaHCO3
12.Precipitate
13.Painting and Chromium Coating over the Surfaces
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