Formaldehyde when treated with KOH gives methanol and potassium formate. The reaction is known as:

(a) Perkin's reaction

(b) Claisen's reaction

(c) Cannizzaro's reaction 

(d) Knoevenagel's reaction

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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In the reaction, P is:

(a) CH3COCHO

(b) CH3COOCH3

(c) CH3COCH2OH

(d) none of these

 

 

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Acetaldehyde reacts with PCl5, to give:

(a) ethyl chloride

(b) ethylene chloride

(c) ethylidene dichloride

(d) trichloroacetaldehyde

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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The reaction  is an example of:

(a) Wolf rearrangement

(b) Favorskii rearrangement

(c) Steven's rearrangement

(d) Wagner-Meerwin rearrangement

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Stephen's reaction is reduction of:

(a) alkyl cyanide with LiAlH4

(b) alkyl cyanide with SnCl2 and HCl

(c) alkyl isocyanide with Na and alcohol

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

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Which of the following does not undergo polymerization?

(a) CH3CHO

(b) HCHO

(c) CH3COCH3

(d) None of these

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Formaldehyde can be distinguished from acetaldehyde by:

(a) Fehling's solution

(b) Schiff's reagent

(c) Ammonia

(d) Ammoniacal AgNO3

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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In Tischenko's reaction an aldehyde is heated with catalyst:

(a) NaOH

(b) Al(OC2H5)3

(c) Al2O3

(d) Mg/Hg

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Formalin is:

(a) formaldehyde

(b) formaldehyde+methanol

(c) formaldehyde+methanol+water

(d) formaldehyde+water

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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Doctors detect diabetes disease by testing the presence of glucose in urine with:

(a) Nessler's reagent

(b) Fehling's solution

(c) Fenton's reagent

(d) Silver nitrate solution

Concept Questions :-

Preparation & properties of Aldehydes and Ketones
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