Are non-polar molecules such as oil,iodine,and nail polish dissolve easily in water?

No because water is a polar solvent and will therefore only dissolve polar solutes (a solute is the substance that dissolves, the solvent is the substance that does the dissolving)





To dissolve the substances you have listed, you need a non-polar solvent. In general - Like dissolves Like - so polar solvents such as water dissolve polar solutes (such as hydrogen chloride) and non-polar solvents (such as hexane) dissolve non-polar solutes (such as oil)