Zinc metal is added to aluminium sulphate solution, no reaction takes place because:

aluminium is more reactive than zinc

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aluminium and zinc both are unreactive

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aluminium is less reactive than zinc

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none of these

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Solution

The correct option is A aluminium is more reactive than zinc
The reactivity series is a list of metals arranged in the order of their decreasing activities. aluminium is more reactive than zinc therefore when it reacts with zinc, it does not get displaced by zinc hence no reaction takes place.

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Food cans are coated with tin and not with zinc because

(a) zinc is costlier than tin.

(b) zinc has a higher melting point than tin.

(d) zinc is less reactive than tin.

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