A) \[{{H}_{2}},{{H}_{3}}B{{O}_{3}}\]
B) \[HCl,\text{ }KB{{O}_{3}}\]
C) \[{{H}_{2}}O,KB{{O}_{3}}\]
D) \[{{H}_{2}}O,KB{{O}_{2}}\]
Correct Answer: D
Solution :
When diboranes reacts with aqueous solution of alkali they form metaborates and hydrogen gas is evolved. \[{{B}_{2}}{{H}_{6}}+2KOH+\underset{(X)}{\mathop{2{{H}_{2}}O}}\,\xrightarrow{{}}+\underset{\begin{smallmatrix} \text{Pott}\text{.}\,\text{Metaborate} \\ \text{(Y)}\,\,\text{+}\,\text{6}{{\text{H}}_{\text{2}}} \end{smallmatrix}}{\mathop{2KB{{O}_{2}}}}\,\] So, X is water and Y is potassium metaborate.
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