Now n-octane is non-polar solvent due to long chain saturated structure. We know that “like dissolves like” so a non-polar compound will be more soluble in non-polar solvent as compared to polar compound.
So cyclohexane is non-polar due to symmetric structure. KCl is ionic in nature as it will dissociate into K + and Cl- ions. CH3CN is polar as mentioned above and CH3OH is also polar in nature.
The order of increasing polarity is:
Cyclohexane < CH3CN < CH3OH < KCl (O is more electronegative than N)
Therefore, the order of increasing solubility is:
KCl < CH3OH < CH3CN < Cyclohexane
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