(a) Arrange the following metals in the increasing order of their reactivities :Copper, Zinc, Aluminium and Iron(b) List two observations you would record in your notebook 30 minutes after adding iron filings to copper sulphate solution.
(a) Metals are given below as per their reactivities
Aluminium > Zinc > Iron > Copper
Among these metals, Aluminium is most reactive on the other hand copper is least reactive.
(b) When iron filling added to copper sulphate, the following is observed:
- The colour of the solution changed from blue to light green.
- The brown coating is observed on the iron fillings.
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