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Chemistry CBSE Live product
Class 10
Chemical reaction and equations
PT1 Revision
4.
Types of chemical reactions
Question:
2
m.
Choose the correct answer:
1.
Identify the chemical compound represented by 'X', which is commonly used in preparing a whitewashing solution.
Calcium chloride
Calcium carbonate
Calcium sulphate
Calcium oxide
2.
Why does the colour of copper sulphate solution change when an iron nail is dipped in it?
Due to a displacement reaction
Due to a decomposition reaction
Due to a combination reaction
Due to a oxidation reaction
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