Sodium borate on reaction with conc. `H_2 SO_4` and `C_2 H_5 OH` gives a compound A which burns with a green edged flame. The compound A is

Options

A. `H_(2)B_(4)O_(7)`
B. `(C_(2)H_(5))_(2)B_(4)O_(7)`
C. `H_(2)BO_(4)`
D. `(C_(2)H_(5))BO_(3)`

Answer

D

Explanation

`Na_(2)B_(4)O_(7)+ 12C_(2)H_(5)OH + 2H_(2)SO_(4) to 4B(C_(2)H_(5)O)_(3) + 2NaHSO_(4) + 7H_(2)O`
`(C_(2)H_(5))_(3)BO_(3)` burns with green flame .