This problem is providing us with a statement in which we need to figure out the word fitting in the blank. At the end, after analyzing the information, the word turns out to be colligative as show below:
<h3>Colligative properties.</h3>
In chemistry, colligative properties of solutions account for the behavior of a solution with respect to the pure solvent, to which a solute is added.
Among them, we have boiling point elevation, freezing point depression, vapor pressure lowering and osmotic pressure, which are all affected by the concentration of the solute but not by the identity of the solute.
In such a way, we conclude that the correct word that fits in the blank is colligative as shown below:
"Colligative properties depend on the concentration of a solute in a solution but not on the identity of the solute."
Learn more about colligative properties: brainly.com/question/10323760
<span>One degree Celsius indicates the same temperature change as one </span>
Answer:
Solutions from highest to lowest freezing point:
0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol
Explanation:

= Depression in freezing point
i = van'T Hoff fcator
= Molal depression constant of solvent
m = molality of the solution
Higher the value of depression in freezing point at lower will be freezing temperature the solution.
1. 0.040 m glycerin
Molal depression constant of water = 
i = 1 ( organic molecule)
m = 0.040 m


2. 0.020 m potassium bromide
Molal depression constant of water = 
i = 2 (ionic)
m = 0.020 m


3. 0.030 m phenol
Molal depression constant of water = 
i = 1 (organic)
m = 0.030 m




Solutions from highest to lowest freezing point:
0.040 m glycerin = 0.020 m potassium bromide > 0.030 m phenol
Actinium-silvery
Boron- black
Calcium-silvery-gray
Berkelium- silvery-white
Chlorine- yellow-green