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CNS^(ө) ions give red colour with Fe^(3+...

`CNS^(ө)` ions give red colour with `Fe^(3+)` ions in aqueous solution as:
`Fe^(3+)(aq) + 3CNS^(ө)(aq) rarr Feunderset("red")((CNS))_(3)(aq) `
If `0.1 M` `KCNS` solution is separated from `0.1 M FeCl_(3)` solution by means of a semi-permeable membrane, red colour will appear on:
a.`FeCl_(3)` soluion , b. `KCNS` solution side ,
c. Both sides , d. Neither side

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