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Science CBSE Homework Assignments
Class 10
Chemical reaction and equations
Chemical reaction
1.
Displacement reaction
Question:
2
m.
1.
A solution of a substance 'X' is used for whitewashing. Write the name of the substance "X".
Calcium oxide(quick lime)
Sodium oxide(soda lime)
Sodium carbonate (soda line)
Calcium carbonate (quick line)
2.
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Because of the oxidation reaction
Because of the displacement reaction
Because of the decomposition reaction
Because of the combination reaction
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