Question

Production of a green edged flame on igniting the vapours evolved by heating a given inorganic salt with few mL of ethyl alcohol and conc. `H_2 SO_4` indicates the presence of a
A. Tartarate
B. oxalate
C. acetate
D. borate

Answer 1

`Na_(3)BO_(3)+3H_(2)SO_(4)overset(Delta)to3Na_(2)SO_(4)+ 2H_(3)BO_(3)`
`H_(3)BO_(3)+3C_(2)H_(5)OH overset(Delta)to underset("Ethyl borate")((C_(2)H_(5))_(3)BO_(3))+3H_(2)O`
Ethyl borate is volatile and burns with a green edged flame.