Q.

Statement I : Boric acid burnt with ethyl alcohol in green edged flame.Statement II : Boric acid when burnt with ethyl alcohol it forms tri ethyl orthoborate.

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a

Both Statements are true

b

Statement I is true Statement II is false

c

Statement I is false and Statement II is true

d

Both Statements are false

answer is A.

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Detailed Solution

ORWhen ortho boric acid is burnt with ethyl alcohol in presence of Conc H2SO4 gives triethyl ortho borate.When the vapours of triethyl borate ignited burn with a green edged flame.The green edged flame is due to the combustion of ethyl borate.This test is used to detect the borates and boric acid in qualitative analysis.
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Statement I : Boric acid burnt with ethyl alcohol in green edged flame.Statement II : Boric acid when burnt with ethyl alcohol it forms tri ethyl orthoborate.