Question

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Answer 1

Explanation:

When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to green.

b. weather refers to short-term changes in the atmosphere, climate describes what the weather is like over a long period of time in a specific area.

c.Magnesium oxide changes the colour of red litmus paper to blue. This reaction shows that magnesium oxide is basic in nature.