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  4. Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of

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Q. Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of

KCETKCET 2007Organic Chemistry – Some Basic Principles and Techniques

Solution:

Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration, which confirms the presence of N and S.

$3 NaCNS +a q \cdot FeCl _{3} \longrightarrow \underset{\text{red (ferric thiocyanide)}}{{Fe ( CNS )_{3}}}+3 NaCl$