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
Verified Correct Answer: C.
Chemical Principles & Mechanism
Zinc displaces copper from copper sulphate and generates zinc sulphate solution when added to CuSO\(_4\) solution because zinc is a more reactive metal that displaces less reactive metal from its solution. This implies Zinc is more electropositive than Copper. The colour change shows it.
Source: Myschool Past Questions Archive (Record #745)