• # question_answer 80)   Identify the compounds 'A', 'X? and 'Z? in the following reactions. (i)$A+2HCl+5{{H}_{2}}O\to 2NaCl+X$ (ii) $X\xrightarrow[370K]{\Delta }HB{{O}_{2}}\xrightarrow[>370K]{\Delta }z$

$A=Borax(N{{a}_{2}}{{B}_{4}}{{O}_{7}})$ $X={{H}_{3}}B{{O}_{3}}$ $Z={{B}_{2}}{{O}_{3}}$ $\underset{\begin{smallmatrix} (A) \\ Borax \end{smallmatrix}}{\mathop{N{{a}_{2}}{{B}_{4}}{{O}_{7}}}}\,+2HCl+5{{H}_{2}}O\xrightarrow{{}}2NaCl+\underset{\begin{smallmatrix} (X) \\ Boric\,acid \end{smallmatrix}}{\mathop{4{{H}_{3}}B{{O}_{3}}}}\,$ $2{{H}_{3}}B{{O}_{3}}\xrightarrow[\begin{smallmatrix} 370K \\ (-2{{H}_{2}}O) \end{smallmatrix}]{\Delta }2HB{{O}_{2}}\xrightarrow[\begin{smallmatrix} >370K \\ (-{{H}_{2}}O) \end{smallmatrix}]{\Delta }\underset{\begin{smallmatrix} (Z) \\ Boric \\ anlydrode \end{smallmatrix}}{\mathop{{{B}_{2}}{{O}_{3}}}}\,$