If excess zinc is added to a bluish green solution of copper (II) sulphate, and the excess zinc filtered off after completion of reaction, a colourless solution is obtained because

A. both zinc and copper are metals
B. the sulphate radical and the zinc ion are divalent
C. zinc is more electropositive than copper  
D. both zinc and copper form depositive ions in solution
E. zinc is a reducing agent

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Correct Answer: C