Question

Do as directed
(1) Blue coloured solution is given in the figure. Which solution is it? What causes the (03)
colour change in this solution. Explain.
green colour solution
Blue colour solution
Radish iron nal
Iron nall
​

Answer 1

AnSwEr :-

The solution is Of Copper sulphate. (Copper sulphate solution)

When iron nails dipped in the copper sulphate solution the colour of Solution changes from blue to green and also the iron nails become brownish or reddish in colour.

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Answer 2

Explanation:

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Blue colour of the copper sulphate solution changes into green colour & then iron nail acquires a brownish look. This is because that iron is more reactive than copper.

The following chemical reaction takes place in this activity.

Fe+CuSO4 → FeSO4 + Cu

In this reaction, iron displaces copper from CuSO4 solution!

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