General Organic Chemistry Question 23
Question 23 - 2024 (29 Jan Shift 1)
Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with $FeSO _4$ in presence of concentrated $H _2 SO _4$ indicates the presence of element/s
(1) $Br$
(2) $N$
(3) $N$ and $S$
(4) $S$
Show Answer
Answer (3)
Solution
Formula: Lead acetate test
$ Fe^{2+} \xrightarrow[\text { Conc. } H _2 SO _4]{H^{+}} Fe^{+3} $
$Fe^{+3} \xrightarrow{-SCN} Fe(SCN) _3($ blood red colour $)$
Appearance of blood red colour indicates presence of both nitrogen and sulphur.
