Formaldehyde can be distinguished from acetaldehyde by:

1. Fehling's solution

2. Schiff's reagent

3. Ammonia

4. Ammoniacal AgNO3

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Product P in the above reaction is -

 

1. 

2. 

3. 

4. 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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Cyanohydrin of which compound gives lactic acid on hydrolysis?

1. Acetone                                 

2. Acetaldehyde

3. Propanal                                 

4. HCHO

Subtopic:  Isomers & Reaction Mechanism |
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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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The enolic form of acetone contains:

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:  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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Acetaldehyde normally 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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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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A and B in the following reactions are  

1. A=RR'CH2CN,              B=NaOH

2. A=RR'C<COOHOH ,          B=CH3

3. A=RR'C<COOHCN ,          B=CH3

4. A=RR"C<OHCN,              B=LiAlH4

Subtopic:  Aldehydes & Ketones: Preparation & Properties | Isomers & Reaction Mechanism |
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Acetone reacts with iodine (I2) to form iodoform in the presence of      

1. CaCO3   

2. NaOH     

3. KOH     

4. MgCO3

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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