`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

Options

A. `FeCl_(3)` solution
B. `KCNS` solution side
C. both sides
D. neither side

Explanation

`Fe^(3+)(aq)+3CNS^(-)(aq)tounderset("Red")(Fe(CNS)_(3))(aq)`
`implies` Only solvent molecule move from Dilute solution to concentrated solution.
So, no red colour will appear.