Question

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II. CHEMISTRY PUZZLE
CHEMICAL REACTIONS :
Questions :
1. The decomposition of vegetable matter into compost is an example of _______ reaction.
2. 2 Mg + O2
2 MgO this is an example of _______ reaction.
3. This gas is filled in chips packets to prevent the oxidation of food.
4. Oxide of which element is the major ingredient of cement.
5. White silver chloride changes to ______ colour when exposed to sunlight.
6. Fe(s) + CuSO4(aq) FeSO4 (aq) + Cu(s) is a type of _______ reaction.
7. CuO + H2 Cu + H2O
heat
Reduction
?
8. When a metal is attacked by substances (air and water) around it. It called as __________.
9. The change in colour and smell of fats and oils due to oxidation is called ____.
10. In the reaction of Barium chloride and Aluminium sulphate, Barium sulphate is formed in the form
of_________.
By reading the above question predict the answers and fill them in 1 to 10 boxes
in the puzzle.

Answer 1

Answer:

1 = exothermic reaction

2= combination reaction

3= nitrogen gas

4= oxide of calcium

5= grey

6= displacement reaction

7= oxidation

8=corrosion

9= rancidity

10= precipitate

Answer 2

Answer:

1.Exothermic

2.Combination

3.Nitrogen

4.Calcium

5.Gray

6.Displacement

7.Oxidation

8.Corrosion

9.Rancidity

10.Precipitate