Which phases of matter have a variable volume

Matter in the plasma state have a variable volume and shape.  Plasma contains ions and electrons , both of which can move around freely.

Apolar solvent will dissolve the sample of calcium chloride

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.