The colour of the solution observed after 30 minutes of placing zinc metal to copper sulphate solution is
(a) Blue
(b) Colourless
(c) Dirty green
(d) Reddish Brown
Answer:
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(b) Colorless
Zinc is a more reactive metal than copper. So, when the zinc metal is placed in a copper sulphate solution, zinc displaces copper from copper sulphate solution to form Zinc sulphate. The blue color of Copper Sulphate disappears and a colorless solution is obtained.
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