Question

A. Choose the correct answer.
1. Which among the following is a physical change?
Cutting
b. Burning
c. Ripening
d. Cooking
2. Which of the following is a chemical change?
a. Burning
b. Germination
c. Ripening
d. All of these
3. What is the chemical formula of rust?
a. FeO,xH,0
b. Fe 04
d. Ca(OH)2
4. What is depositing a layer of zinc on iron called?
a. Galvanisation
b. Crystallisation
c. Sublimation
d. Layering
5. What is the reaction in which a solid substance is obtained in its purest form?
a. Displacement reaction
b. Combination reaction
c. Crystallisation
d. Decomposition reaction
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Answer 1

Answer:

answr fr the 2st q:cutting

answr fr the 2nd:al of these

answr fr the 3rd:. FeO,xH,0

answr fr the 4th:Galvanisation

answr fr the 5th:c. Crystallisation