Question

1. which of the following substances is soluble in a polar solvent like water? a. benzene (c6h6) b. ethanol (c2h5oh) c. hexane (c6h14) d. ethylene (c2h4)

Explanation:

The principle of "like - dissolves - like" applies. Water is a polar solvent. Ethanol has a polar - OH group which can form hydrogen bonds with water molecules. Benzene, hexane, and ethylene are non - polar substances and are insoluble in polar water.

Answer:

B. Ethanol ($C_2H_5OH$)