Polar solvents dissolve solutes and non-polar solvents solutes.
pt 1 :
a) polar
b) non-polar
pt 2 :
a) polar
b) non-polar

Answer : Polar solvents dissolve polar solutes and non-polar solvents dissolve non-polar solutes.

Explanation :

According to the concept of “Like dissolves like”, the polar solvents dissolve polar solutes, and non-polar solvents dissolve non-polar solutes.

For example : In the ionic compounds, like sodium chloride are soluble in the water. And as we know that the water molecules are polar in nature. So, they interact with the sodium and chloride ions.

Hence, the polar solvents dissolve polar solutes and non-polar solvents dissolve non-polar solutes.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).