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When in the blue solution of copper sulphate, zinc strip is dipped, after some time the colour changes to:
  • a)
    Pink
  • b)
    Green
  • c)
    Colourless
  • d)
    Remains blue
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
When in the blue solution of copper sulphate, zinc strip is dipped, af...
Zn + CuSO4(aq) → Cu + ZnSO4
Blue Colourless
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Most Upvoted Answer
When in the blue solution of copper sulphate, zinc strip is dipped, af...
Explanation:

Chemical reaction:
When a zinc strip is dipped in a blue solution of copper sulphate, a displacement reaction takes place. The zinc atoms displace copper ions from the copper sulphate solution to form zinc sulphate and copper metal. The balanced chemical equation for the reaction is:

Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)

Colour change:
Initially, the blue colour of the copper sulphate solution is due to the presence of Cu2+ ions in the solution. When the zinc strip is dipped in the solution, the copper ions are reduced to copper metal and get deposited on the surface of the zinc strip. The solution gradually loses its blue colour, indicating the depletion of Cu2+ ions in the solution. After some time, the solution becomes colourless as there are no more Cu2+ ions left in the solution.

Conclusion:
Hence, the correct answer is option 'C' (Colourless).
Free Test
Community Answer
When in the blue solution of copper sulphate, zinc strip is dipped, af...
Reaction=
Cuso4+Zn=Znso4+Cu
when zinc strip is dipped in copper sulphate solution it displaces copper from its salt solution to form zinc sulphate which makes the blue solution of copper sulphate to change in colourless zinc sulphate solution.
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When in the blue solution of copper sulphate, zinc strip is dipped, after some time the colour changes to:a)Pinkb)Greenc)Colourlessd)Remains blueCorrect answer is option 'C'. Can you explain this answer?
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