question_answer

Sodium borate on reaction with \[{{H}_{2}}S{{O}_{4}}\] (conc.) and \[{{C}_{2}}{{H}_{5}}OH\] gives a compound ?A? which burns with green flame. The compound ?A? is [MP PET 1994]

A) \[{{H}_{2}}{{B}_{4}}{{O}_{7}}\]

B) \[{{\left( {{C}_{2}}{{H}_{5}} \right)}_{2}}{{B}_{4}}{{O}_{7}}\]

C) \[{{H}_{3}}B{{O}_{3}}\]

D) \[{{\left( {{C}_{2}}{{H}_{5}} \right)}_{3}}B{{O}_{3}}\]