If you have 90 ml of water mixed with 10 ml of pollutant the concentration of pollutant is a: 1:1 b: 1:10 c: 20:500 d: 1:1000

c, liquids evaporate, creating a gas

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.