In Lassaigne's extract of an organic compound,both nitrogen and sulphur are present,which gives blood red colour with $Fe^{3+}$ due to the formation of-

  • A
    $[Fe(SCN)]^{2+}$
  • B
    $Fe_4[Fe(CN)_6]_3 \cdot xH_2O$
  • C
    $NaSCN$
  • D
    $[Fe(CN)_5NOS]^{4-}$

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In the detection of carbon and hydrogen,the organic compound is heated with which of the following?

If $N$ and $S$ are present in an organic compound during the Lassaigne test,then both change into:

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If on adding $FeCl_3$ solution to acidified Lassaigne solution of an organic compound a blood red colouration is produced,it indicates the presence of

The fusion of sodium with an organic compound containing nitrogen gives mainly:

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Match column $-I$ and column $-II$ with the correct relation:
Column $-I$ Column $-II$
$(i).$ Prussian blue $(a).$ Presence of phosphorus
$(ii).$ Yellow precipitate $(b).$ Presence of sulphur
$(iii).$ Purple solution $(c).$ Presence of nitrogen
$(iv).$ Black precipitate $(d).$ Presence of chlorine

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