The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

  • A
    $Fe(CN)_3$
  • B
    $Na_3[Fe(CN)_6]$
  • C
    $Fe_4[Fe(CN)_6]_3$
  • D
    $Na_4[Fe(CN)_5NOS]$

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The Lassaigne's extract is boiled with conc. $HNO_3$ while testing for halogens. By doing so it

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Beilstein test is used for the detection of which one of the following elements?

Match List-$I$ with List-$II$.
List-$I$ Element detected List-$II$ Reagent used/Product formed
$A$. Nitrogen $I$. $Na_2[Fe(CN)_5NO]$
$B$. Sulphur $II$. $AgNO_3$
$C$. Phosphorus $III$. $Fe_4[Fe(CN)_6]_3$
$D$. Halogen $IV$. $(NH_4)_2MoO_4$

Choose the correct answer from the options given below:

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