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When iron pieces are added to a blue colour copper sulphate solution, the colour of copper sulphate changes to
  • a)
    green
  • b)
    brown
  • c)
    blue black
  • d)
    none of these 
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
When iron pieces are added to a blue colour copper sulphate solution, ...
When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
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When iron pieces are added to a blue colour copper sulphate solution, the colour of copper sulphate changes toa)greenb)brownc)blue blackd)none of theseCorrect answer is option 'A'. Can you explain this answer?
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