Question

which one BeCl2 MgCl2 and Cacl2 can be sublimed​

Answer 1

Answer:

Explanation:

If a compound should be sublimed,it shlould become vapour without  melting and at the same time its impurities should not sublime.If a compound becomes vapour at once again that compound should become solid that it should be able to condense.such compounds must have high decomposition point.only such compounds can sublime.actually sublimation is the process where a compond becomes vapour skipping the liquid state.

Here,    Berilium,magnesium,calcium, chlorides are salts.according to my knowledge, any of this cant sublime.As they decompose at low temperatures.

THIS IS ACCORDING TO ME.BUT I DONT KNOW WHETHER IT IS CORRECT.

Answer 2

The given chlorides are all salts that decompose at very low temperatures and therefore none of them can sublime.  

EXPLANATION:

Sublimation is a process in which a compound changes from solid to vapour state surpassing the liquid state. The vapour on condensation must again form the solid if the compound is sublime.

For compounds to undergo sublimation, the decomposition temperature must be very high. The chlorides of beryllium, magnesium and calcium have low decomposition temperatures and thus do not sublime.