Paraldehyde is used as a:

(1) saporific                   

(2) poison

(3) polymer                   

(4) dye

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
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A typical compound undergoes Cannizzaro's reaction and aldol condensation. It is:

(1) (CH3)2CHCHO       

(2) HCHO

(3) C6H5CHO             

(4) CH3CHO

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 53%
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Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is known as:

1. Perkin's reaction

2. Claisen's reaction

3. Cannizzaro's reaction 

4. Knoevenagel's reaction

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 86%
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In the reaction, P is: 

(1) CH3COCHO

(2) CH3COOCH3

(3) CH3COCH2OH

(4) none of these

 

 

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 51%
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Acetaldehyde reacts with PCl5, to give:

(1) ethyl chloride

(2) ethylene chloride

(3) ethylidene dichloride

(4) trichloroacetaldehyde

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 53%
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The reaction  is an example of:

(1) Wolf rearrangement

(2) Favorskii rearrangement

(3) Steven's rearrangement

(4) Wagner-Meerwin rearrangement

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 51%
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Stephen's reaction is reduction of:

(1) alkyl cyanide with LiAlH4

(2) alkyl cyanide with SnCl2 and HCl

(3) alkyl isocyanide with Na and alcohol

(4) acyl halide in the presence of Pd/BaSO4

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 84%
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Which of the following does not undergo polymerization?

(1) CH3CHO

(2) HCHO

(3) CH3COCH3

(4) None of these

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 56%
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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 |
 52%
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In Tischenko's reaction an aldehyde is heated with catalyst:

(1) NaOH

(2) Al(OC2H5)3

(3) Al2O3

(4) Mg/Hg

Subtopic:  Aldehydes & Ketones: Preparation & Properties |
 83%
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