Common salt sublimes on heating whereas ammonium chloride does not.
Ammonium chloride sublimes on heating whereas common salt does not.
That's the reason the given statement is false.
In the process of sublimation to separate a mixture of common salt and ammonium chloride, common salt sublimes on heating whereas ammonium chloride does not.
To separate common salt and ammonium chloride we use the property that ammonium chloride ___________ while salt does not.