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Which of the following is ( are ) correc...

Which of the following is ( are ) correct for the sodium fusion extract of an organic compound both nitrogen and sulphur, carried out with excess of sodium ?

A

On treating sodium fusion extract with sodium nitroprusside, violet colour appears

B

On treating sodium fusion extract with iron (II) sulphate and then acidification with conc. `H_(2)SO_(4)` produce Prussian blue colour

C

On treating sodium fusion extract with acetic acid and lead acetate, a black precipitate is formed

D

On treating sodium fusion extract with iron (III) chloride blood red colour appears.

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