Question

2.
Why does the colour of copper sulphate solution change when
an iron nail is dipped in it?
Give an example of a double displacement reaction other than
the one given in Activity 1.10.
Identify the substances that are oxidised and the substances
that are reduced in the following reactions.
(i) 4Na(s) + O2(g) → 2NaO(s)
(ii) CuO(s) + H, (g) → Cu(s) + H,O(1)
3.​

Answer 1

Answer:

Explanation:

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