• question_answer What is the oxidation number of hydrogen in $LiAl{{H}_{4}}$? Name a compound in which hydrogen has the same oxidation state.

$\overset{+1}{\mathop{L}}\,i\overset{+3}{\mathop{A}}\,l\overset{x}{\mathop{{{H}_{4}}}}\,\,:\,1+3+4x=0$ or  $x=-1$ In sodium hydride (NaH); O.N. of $H=-1$.