Chemistry-10th Chemical Reactions and Equations CBSE Board 2025 Medium
A student has dipped some iron nails in an aqueous solution of copper sulphate. After about 25 minutes, he wo…
A student has dipped some iron nails in an aqueous solution of copper sulphate. After about 25 minutes, he would observe that the colour of the solution has changed from.
- (a)blue to colourless
- (b)blue to pale green
- (c)pale green to blue
- (d)pale green to colourless
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