The property of electrical conductivity is dependent upon the nature of the molecule. Ionic compounds conduct whereas the covalent compounds do not conduct.

BeH₂ is a covalent compound and hence do not exhibit conductivity and on the other hand CaH₂ is an ionic hydride because of which it conducts in molten or aqueous state. TiH₂ is totally metallic in nature and hence it conducts under normal operating conditions.

Hence, the increasing order of electrical conductance is as follows:

BeH₂ < CaH₂ < TiH_2.