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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. $H_2SO_4$ indicates the presence of a

(a) Tartarate
(b) Oxalate
(c) Acetate
(d) Borate
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  • Ethyl Borate is Volatile and burns with a green edged flame.
Answer: Borate
$NaBO_3 + 2H_2SO_4 \overset{\Delta}{\longrightarrow} 3Na_2SO_4 + 2H_2BO_3$
(Sodium Borate) (Sulphuric acid) (Sodium Sulphate) (Boric Acid)
$H_3BO_3 + 3C_2H_5OH \overset{\Delta}{\longrightarrow} (C_2H_5)_3BO_3 + 3H_2O$
               (Ethyl alcohol)     (Ethyl Borate)
answered Jan 26, 2014 by mosymeow_1

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