Which one of the following is not expected to undergo iodoform reaction?
Propan-2-ol
Diphenyl methanol
1-phenylethanol
2-butanol
Identify the combination of compounds that undergo aldol condensation followed by dehydration to produce but-2-enal
methanal and ethanal
two moles of ethanal
methanal and propanone
ethanal and propanone
An organic compound with the molecular formula C8H8O forms 2,4-DNP derivative, reduces Tollen's reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzenedicarboxylic acid. The organic compound is
2-ethylbenzaldehyde
2-methylbenzaldehyde
acetophenone
3-methylbenzaldehyde
B.
2-methylbenzaldehyde
Since, the compound forms 2, 4-DNP derivative, so it is a carbonyl compound. It reduces Tollen's reagent and undergoes Cannizzaro reaction, therefore, it contains -CHO group and no α-H atoms.
Thus, its possible formula may be CH3C6H4CHO. Since, it gives 1, 2-benzene- dicarboxylic acid when subjected to oxidatin, so CH3 and - CHO groups must be present at successive positions. Thus, the structure of the compound must be
The reaction occurs as follows-
Phenyl isocyanide is prepared from aniline by
Carbylamine reaction
Rosenmund's reaction
Koble's reaction
Reimer-Tiemann reaction
Gabriel's phthalimide synthesis can be used to prepare
ethanamine
N-methylmethanamine
benzene amine
N, N-dimethylmethanamine
The sugar moiety present in RNA molecule is
β-D-2-deoxyribose
β-D-galactose
β-D-fructofuranose
β-D-ribose
Novlac, the linear polymer used in paints is
copolymer of 1,3-butadiene and styrene
obtained by the polymerization of methyl methacrylate
nitial product obtained in the condensation of phenol and formaldehyde in the presence of acid catalyst
obtained by the polymerisation of caprolactam