question_answer 1)

  An ionic hydride of an alkali metal has significant covalent character and is almost un reactive towards oxygen and chlorine. This is used in the synthesis of other useful hydrides. Write the formula of the hydride. Write its reaction with\[A{{l}_{2}}C{{l}_{6}}\].

Answer:

  The hydride is\[LiH\]. \[8LiH+A{{l}_{2}}C{{l}_{6}}\to 2LiAl{{H}_{4}}+6LiCl\]