Consider the reactions :
A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine
A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide
A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
C.
A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
Since 'A' gives positive silver mirror test, therefore, it must be an aldehyde or α-hydroxy ketone.
Reaction with semicarbazide indicates that A can be an aldehyde or ketone.
Reaction with OH– i.e., aldol condensation (by assuming alkali to be dilute) indicates that A is aldehyde as aldol reaction of ketones is reversible and carried out in special apparatus.
The IUPAC name of the compound
3-keto-2-methylhex-4-enal
5-formylhex-2-en-3-one
5-methyl-4-oxohex-2-en-5-al
5-methyl-4-oxohex-2-en-5-al
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
Formation of intramolecular H-bonding
Formation of intermolecular H-bonding
Formation of intermolecular H-bonding
More extensive association of carboxylic acid via Vander Waals force of attraction
Compound A, C8H10O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively
The product of acid hydrolysis of (P) and (Q) can be distinguished by
Lucas reagent
2,4-DNP
Fehling's solution
NaHSO3
Clemmensen reaction of the ketone is carried out in the presence of
LiAlH4
Zn-Hg with HCl
glycol with KOH
H2 with Pt as a catalyst
Consider the following compounds
Cl3C - COOH Br3C - COOH I3C - COOH
(I) (II) (III)
The decreasing order of decarboxylation is
I > II > III
III > II > I
III > I > II
II > I > III