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Question

When sodium hydroxide solution is added to copper sulfate solution, a blue precipitate of copper hydroxide is formed along with sodium sulfate solution. What kind of chemical reaction takes place between them?

A
Chemical combination reaction
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B
Chemical decomposition reaction
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C
Chemical displacement reaction
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D
Chemical double decomposition reaction
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Solution

The correct option is B Chemical double decomposition reaction
Copper sulfate solution reacts with sodium hydroxide solution to form a precipitate of copper hydroxide.
According to the equation:
2NaOH+CuSO4Na2SO4+Cu(OH)2

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