• # question_answer 81)   Complete the following chemical equations : $Z+3LiAl{{H}_{4}}\to X+3LiF+3Al{{F}_{3}}$ $X+6{{H}_{2}}O\to Y+6{{H}_{2}}$ $3X+3{{O}_{2}}\to {{B}_{2}}{{O}_{3}}+3{{H}_{2}}O$

Z is $B{{F}_{3}}$ and X is${{B}_{2}}{{H}_{6}}$. $\underset{(Z)}{\mathop{4B{{F}_{3}}}}\,++3Lil{{H}_{4}}\xrightarrow{{}}\underset{(X)}{\mathop{2{{B}_{2}}{{H}_{6}}}}\,+3LiCl+3AlC{{l}_{3}}$ Diborane $({{B}_{2}}{{H}_{6}})$ reacts readily with water liberating hydrogen. $\underset{(X)}{\mathop{{{B}_{2}}{{H}_{6}}}}\,+6{{H}_{2}}O\xrightarrow{{}}\underset{(Y)}{\mathop{2{{H}_{3}}B{{O}_{3}}}}\,+6{{H}_{2}}$ $\underset{(X)}{\mathop{{{B}_{2}}{{H}_{6}}}}\,+3{{O}_{2}}\xrightarrow{{}}{{B}_{2}}{{O}_{3}}+3{{H}_{2}}O$ The reaction is highly exothermic.