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In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with …

Q1

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

[NEET 2023]

a

\(\mathrm{NaSCN}\)

b

\(\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-}\)

c

\([\mathrm{Fe}(\mathrm{SCN})]^{2+}\)

d

\({\mathrm{Fe}}_{4}{\left[\mathrm{Fe}\left(\mathrm{CN}{)}_{6}\right)\right]}_{3}\cdot {\mathrm{xH}}_{2}\mathrm{O}\)

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