COMEDK2025ChemistryGeneral Organic ChemistryActual
Identify the incorrect statement
Options
- AIn organic compounds resonance effect operates only in unsaturated compounds and results in delocalisation of
- BLarger the number of methyl groups linked to the doubly bonded Carbon atoms, greater is the stability of the a
- CThe Prussian blue precipitate formed during Lassaigne's test for detection of Nitrogen in an organic compound
- DIn the Carius method for estimation of halogens in an organic compound, the compound is heated with fuming nit
Correct answer
C. The Prussian blue precipitate formed during Lassaigne's test for detection of Nitrogen in an organic compound
Step-by-step solution
(1) Correct: Resonance effect involves delocalization of -electrons or lone pairs, requiring unsaturated or conjugated systems. (2) Correct: More alkyl (methyl) groups on doubly bonded carbons increase stability via hyperconjugation. (3) Incorrect: The correct formula for Prussian blue is Fe₄[Fe(CN)₆]₃ xH₂O . The formula given in option (3) has the wrong subscript (2 instead of 3) for the hexacyanoferrate ion. (4) Correct: In the Carius method, the organic compound is heated with fuming nitric acid in presence of A