Which one of the following undergoes aldol condensation?
Acetaldehyde
Propanaldehyde
Acetone
All of these
In the cannizzaro reaction given below
2C6H5CHO C6H5CH2OH + C6H5COO-
The slowest step is
The attack of OH- at the carbonyl group
The transfer of hydride ion to the carbonyl group
The abstraction of proton from the carboxylic acid
The deprotonation of benzyl alcohol
The total number of optical isomers possible in aldohexose is
2
16
8
4
B.
16
Aldohexose has 4 chiral carbon atoms. No. of optical isomers = 2n =24 = 16
A new carbon-carbon bond formation is possible in:
I. Cannizzaro reaction
II. Friedel-Craft reaction
III. Clemmensen reduction
IV. Reimer-Tiemann reaction
I, II and III
II, III and IV
I and III
II and IV
Which of the following compounds formed during Perkin's reaction?
Resorcinol
Cinnamic acid
Benzaldehyde
Benzoin
Consider the following reaction
In this reaction which is not correct?
(X) is Me3C+
(X) is Me3CH-
(Z) is H+
Which of the following set of combination are correct?
1.Fenton reagent : Alcohol →Aldehyde
2. Ziegler-Natta catalyst : Polymerisation
3.Adam catalyst : Oxidation
4.Fe/Mo catalyst : Synthesis of NH3
1 and 3
1and 2
2 and 3
2 and 4
The reagent which distinguishes formic acid and acetic acid is
2, 4-dinitrophenyl hydrazine
HgCl2
C2H5ONa
Hg2Cl2