Final answer:The substances that are insoluble in water out of the ones you provided are sand and oil. This is because they arenonpolar substancesand do not dissolve in polar solvents like water.Explanation:Of the substances you listed - salt (sodium chloride), sugar (sucrose), sand, and oil - the ones that areinsolublein water are sand and oil. Substances like sugar (sucrose) and salt (sodium chloride) are able to dissolve in water because they are polar substances, and 'like dissolves like'. Meaningpolar substancesdissolve in polar solvents like water. Sucrose, for example, is a covalent solid and when this compound, C12H22O11, dissolves in water, its molecules uniformly distribute themselves among the molecules of water (H2O).On the other hand, substances like oil and sand are nonpolar and do not dissolve inpolar solventslike water. Nonpolar substances are not attracted to the polar water molecules and therefore do not dissolve.Learn more aboutSolubilityhere:brainly.com/question/31493083#SPJ11...

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