Question
What happens when $${H_2}$$ is passed over lithium at $$1073\,K?$$
A.
Covalent lithium hydride is formed.
B.
Coloured complex is formed.
C.
Ionic lithium hydride is formed.
D.
No reaction takes place.
Answer :
Ionic lithium hydride is formed.
Solution :
Lithium forms ionic hydride having high melting point.
\[2Li+{{H}_{2}}\xrightarrow{1073\,K}\underset{\begin{smallmatrix}
\text{Lithium} \\
\text{hydride}
\end{smallmatrix}}{\mathop{2LiH}}\,\]