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Q.

Boric acid when burnt with ethyl-alcohol gives a green edged flame due to the combustion of ____?

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a

Boric anhydride

b

Meta-boric acid

c

Tri-ethyl borate

d

Ortho boric acid

answer is C.

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Detailed Solution

Following is the reaction

BOH3+3C2H5OH→HeatH2SO4BOC2H53+3H2O

Tri-ethyl borate burns with a green edge flame.

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