Amongst the following compounds,identify which are insoluble,partially soluble,and highly soluble in water:
$(i)$ phenol,$(ii)$ toluene,$(iii)$ formic acid,$(iv)$ ethylene glycol,$(v)$ chloroform,$(vi)$ pentanol.

(N/A) $(i)$ Phenol $(C_{6}H_{5}OH)$ contains a polar $-OH$ group and a non-polar phenyl ring. It is partially soluble in water.
$(ii)$ Toluene $(C_{6}H_{5}CH_{3})$ is a non-polar hydrocarbon. It is insoluble in water.
$(iii)$ Formic acid $(HCOOH)$ can form strong hydrogen bonds with water. It is highly soluble in water.
$(iv)$ Ethylene glycol $(HOCH_{2}CH_{2}OH)$ has two polar $-OH$ groups and forms extensive hydrogen bonds. It is highly soluble in water.
$(v)$ Chloroform $(CHCl_{3})$ is a non-polar organic solvent. It is insoluble in water.
$(vi)$ Pentanol $(C_{5}H_{11}OH)$ has a polar $-OH$ group but a long hydrophobic alkyl chain. It is partially soluble in water.