MCQ
Unit of mole fraction is
- AMoles/litre
- BMoles/litre$^2$
- CMoles-litre
- ✓Dimensionless
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Reason : Cuprous ion $(Cu^+)$ is colourless whereas cupric ion $(Cu^{2+})$ is blue in the aqueous solution.


(Rounded-off to the nearest integer)
[Given $K _{ b }$ for $\left.\left( H _{2} O \right)=0.52\, K\, kg\, mol ^{-1}\right]$