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0.05M CuSO4 when treated with 0.01M K2Cr2O7 gives green colour solution of Cu2Cr2O7. The [SPM : Semi Permeable Membrane] K2Cr2O7 | CuSO4 Side X | Side Y Due to osmosis :

1. Green colour formation observed on side Y.
2. Green colour formation observed on side X.
3. Molarity of K2Cr2O7 solution is lowered.
4. Molarity of CuSO4 solution is lowered.

Correct answer: Molarity of CuSO4 solution is lowered.

Solution

The correct option is right because during osmosis, water moves from the side with lower solute concentration (K2Cr2O7) to the side with higher solute concentration (CuSO4), thereby diluting the CuSO4 solution and lowering its molarity.

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