Question -
Answer -
(i) phenol (ii) toluene (iii) formic acid
(iv) ethylene glycol (v) chloroform (vi) pentanol.
Answer
(i) Phenol(C6H5OH) has the polar group −OH and non-polar group −C6H5.Thus, phenol is partially soluble in water.
(ii) Toluene(C6H5−CH3) has no polar groups. Thus, tolueneis insoluble in water.
(iii) Formicacid (HCOOH) has the polar group −OH and can form H-bond with water. Thus,formic acid is highly soluble in water.
(iv) Ethyleneglycol 
has polar −OH group and canform H−bond. Thus, it is highly soluble in water.
(v) Chloroformis insoluble in water.
(vi) Pentanol(C5H11OH) has polar −OH group, but it also contains avery bulky non-polar −C5H11 group. Thus, pentanolis partially soluble in water.