Answer: Option (2) is the correct answer.
Step-by-step explanation:
It is known that like dissolves like. This means that polar solvents are able to dissolve polar or ionic molecules where as non-polar solvents are able to dissolve non-polar molecules.
For example, potassium chloride (KCl) is an ionic compound and water is a polar solvent. Hence, when KCl is added in water then KCl readily dissolves as it will dissociate into ions.
Whereas oil is a non-polar solvent, therefore, when KCl is added to oil then KCl does not dissolve in oil.
Thus, we can conclude that the statement potassium chloride will dissolve in water but not in oil is true: because kCl is an ionic compound and water is polar; whereas oil is nonpolar.