Question

QUESTIONS
3.
QUE.1 Why does the colour of copper sulphate solution change when
an iron nail is dipped in it?
QUE.2 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) + 0,1g) - 2Na,O(s)
(ii) CuO(s) + H, (g) → Cu(s) + H,O(1)​

Answer 1

Answer:

1 because nail is made up of iron so it changes its color

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