An ionic hydride of an alkali metal has significant covalent character and is almost unreactive towards oxygen and chlorine. This is used in the synthesis of other useful hydrides. Write the formula of this hydride. Write its reaction withAl_2Cl_6.

An ionic hydride of an alkali metal has significant covalent character

1.	An ionic hydride of an alkali metal has significant covalent character and is almost unreactive towards oxygen and chlorine. This is used in the synthesis of other useful hydrides. Write the formula of this hydride. Write its reaction withAl_2Cl_6.
Answer» Solution :The comp is LIH. It is a smallest alkali METAL. It has a covalent CHARACTER. Since LiH is very stable there fore it is almost UNREACTIVE TOWARDS `O_2` and `Cl_2`. It reacts with `Al_2Cl_6` to form lithium aluminium hydride. `8LiH + Al_2Cl_6 to 2LiAlH_4 + 6LiCl`