Question

if the relative density of alcohol is 0.85,then it will occupy less volume than an equal amount of water.this statement is correct or not?

Answer 1

           amount  =      Mass = volume * density
                 volume = amount / (relative) density

If the relative density (with respect to water) is (0.85) less than 1, it means that for the same mass, it has more volume.

that statement is wrong.