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The lassaigne's extract is boiled with conc HNO3 wile testing for halogens by doing so it
4 520
N react with Fe2+ in presence of concentrated sulphuric acid and forms a Prussian blue coordination compound on further reaction with Fe3+ . The final compound is
4 520
Used for organic compounds all organic compounds have carbon
But not all carbon containing compounds
And also organic compounds containing these compounds are first converted into inorganic compounds and reacted with Na
