Aldol condensation will not take place in            [1999]

(a) HCHO                       (b) CH3CHO

(c) CH3COCH3                (d) CH3CH2CHO         

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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A and B in the following reactions are    [2003]

(a) A=RR'CH2CN,              B=NaOH

(b) A=RR'C<COOHOH ,          B=CH3

(c) A=RR'C<COOHCN ,          B=CH3

(d) A=RR"C<OHCN,              B=LiAlH4

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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RCOOH RCH2OH. This mode of reduction of an acid to alcohol can be affected only by:

1. Zn/HCl

2. Na-alcohol

3. aluminium isopropoxide and isopropyl alcohol

4. LiAlH4

 

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Ethyl ester ExcessCH3MgBr P. the product P will be: 

1. 

2. 

3.

4. 

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Which of the following has most acidic proton?

(a) CH3COCH3                             (b) (CH3)2C=CH2

(c) CH3COCH2COCH3                   (d) (CH3.CO)3CH

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Which one of the following can be oxidised to the corresponding carbonyl compound?   [2004]

(a) 2-hydroxy propane

(b) Ortho-nitro phenol

(c) Phenol

(d) 2-methyl-2-hydroxy propane

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Dry distillation of barium salt of Hexane-1,2-dicarboxylic acid gives:

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Polarisation of electrons in acrolein may be written as             

1. Cδ+H2=CH-CH=Oδ-

2. Cδ+H2=Cδ+H-CH=O

3. Cδ+H2=CH-CH=Oδ+

4. Cδ+H2=CH-Cδ+H=O

 

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Consider the following reaction;

CH3Br + Mg EtherAHCHOBHOHC

compound C is:

(a) acetic acid                              (b) acetaldehyde

(c) ethyl alcohol                            (d) formic acid

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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The conversion of CH3OH to CH3COOH can be brought in by:

1. K2Cr2O7/H+                           

2. CO + Rh

3. KMnO4                                   

4. H3PO4

Concept Questions :-

Carboxylic Acids
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