Aldehydes, Ketones and Carboxylic Acids

Which one of the following undergoes aldol condensation?

• Acetaldehyde

• Propanaldehyde

• Acetone

• All of these

In the cannizzaro reaction given below

2C₆H₅CHO $\stackrel{{\mathrm{OH}}^{-}}{\to }$ 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

${\mathrm{CHCl}}_3\underset{\mathrm{hv}}{\overset{\left[\mathrm{O}\right]}{\to }} \mathrm{A} \stackrel{{\mathrm{NH}}_3}{\to } \mathrm{B} \underset{{\mathrm{PoCl}}_3}{\overset{\mathrm{Malonic} \mathrm{acid}}{\to }} \mathrm{C}$ 

The end product C in the following reaction is used as

• explosive

• hypnotic

• tear gas

• analgesic

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 

${\mathrm{Me}}_2\mathrm{C}={\mathrm{CH}}_2 + {\mathrm{H}}^{+} \stackrel{{\mathrm{H}}_2{\mathrm{SO}}_4}{\rightleftharpoons } \left(\mathrm{X}\right) \stackrel{\mathrm{EtOH}}{\rightleftharpoons }\left(\mathrm{Y}\right) \underset{\left(\mathrm{Z}\right) }{\to }{\mathrm{Me}}_3\mathrm{COEt}$

In this reaction which is not correct?

• (X) is Me₃C⁺

• (X) is Me₃CH-$\stackrel{+}{\mathrm{C}}\mathrm{H}$

• (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

In the following reaction,

$C_6{\mathrm{H}}_5{\mathrm{NO}}_2 \stackrel{\mathrm{Sn}/\mathrm{HCl}}{\to } \mathrm{X} \stackrel{{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}}{\to } \mathrm{Y} + \mathrm{HCl}$

the product Y is

• azobenzene

• acetanilide

• benzanilide

• hydrazobenzene