Benzaldehyde and acetaldehyde can be distinguished by:

1. Iodoform test

2. 2:4 DNP test

3. NH3 reaction

4. Wolff-Kishner's reduction

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Acetaldehyde reacts with                

1. only electrophiles

2. only nucleophiles

3. only free radicals

4. both electrophiles and nucleophiles

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Nucleophilic addition reaction will be most favoured in                   [2006]

(1) 
                        O
                        
CH3-CH2-CH2C-CH3

(2) (CH3)2C=O

(3) CH3CH2CHO

(4) CH3CHO

Subtopic:  Isomers & Reaction Mechanism |
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What is present in acetone's enolic form?

1. 9 σ-bonds, 1π-bond and 2 lone pairs

2. 8 σ-bonds, 2π-bonds and 2 lone pairs

3. 10 σ-bonds, 1π-bond and 1 lone pair

4. 9 σ-bonds, 2π-bonds and 1 lone pair

Subtopic:  Isomers & Reaction Mechanism |
 79%
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In this reaction,

CH3CHO + HCN CH3CH(OH)CN H.OHCH3CH(OH)COOH

an asymmetric compound is generated. The acid obtained would be            

1. 50% D + 50% L-isomer

2. 20% D + 80% L-isomer

3. D-isomer

4. L-isomer

Subtopic:  Isomers & Reaction Mechanism |
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Which compound, upon hydrolysis of its cyanohydrin, yields lactic acid?

1. Acetone                                 

2. Acetaldehyde

3. Propanal                                 

4. HCHO

Subtopic:  Isomers & Reaction Mechanism |
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Formaldehyde can be distinguished from acetaldehyde by:

(a) Fehling's solution                     

(b) Schiff's reagent

(c) Ammonia                               

(d) Ammoniacal AgNO3

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Consider the following reaction,

The reaction is fastest when X is-

1. Cl

2. NH2

3. OC2H5

4. OCOR

Subtopic:  Isomers & Reaction Mechanism |
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In a set of reaction propionic acid yielded a compound D.

CH3CH2COOHSOCl2 BNH3 CBr2KOH

The structure of D would be

1. CH3CH2NHCH3

2. CH3CH2NH2

3. CH3CH2CH2NH2

4. CH3CH2CONH2

Subtopic:  Carboxylic Acids: Preparation & Properties |
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Zn-Hg/HClProduct, Product is

1.  

 

2.

 

3.    

 

4.

 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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