Question

1.
Observe the following test tubes. In which of the test tubes no reaction takes place!
Give reason for your choice.
-cuso
ALSO
ZnSO4
FeSO4
Zn
Fe
AL
Zn-​

Answer 1

Answer:

,1 .when we added zinc to the solution of ferrous sulphate, the colour of ferrous sulphate solution changes because zinc is more reactive than ferrous, therefore when we add zinc granules in ferrous sulphate solution, it displaces ferrous sulphate solution and forms zinc sulphate solution.

2.When zinc granules are added to ferrous sulfate, the zinc metal displaces iron metal from its chemical reaction and it decolorize the solution. Zinc is more reactive metal than iron as seen from the reactivity series.

3.When zinc is added to the solution of iron sulphate, the colour of iron sulphate solution changes. It is because zinc is more reactive than iron, therefore, it displaces iron from its solution of iron sulphate and a grey precipitate of iron and a colourless solution of zinc sulphate is formed.

Explanation:

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