A zinc strip was dipped in aqueous solutions of Iron sulphate, zinc sulphate, copper sulphate and Aluminium sulphate as shown below. a coating on Zinc will be observed in
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Explanation:
The question is about the reactivity of various metals. Now if we look at the reactivity of metals, we find that among the four metals given, aluminium is the most reactive. Then comes Zinc, followed by Iron and hence the least reactive of all is copper.
Now when zinc strip is dipped in all four solutions, the ZInc will displace metals of copper and iron
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