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

In the reaction, P is: 

(1) CH₃COCHO

(2) CH₃COOCH₃

(3) CH₃COCH₂OH

(4) none of these

Acetaldehyde reacts with PCl₅, to give:

(1) ethyl chloride

(2) ethylene chloride

(3) ethylidene dichloride

(4) trichloroacetaldehyde

The reaction  is an example of:

(1) Wolf rearrangement

(2) Favorskii rearrangement

(3) Steven's rearrangement

(4) Wagner-Meerwin rearrangement

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

Which of the following does not undergo polymerization?

(1) CH₃CHO

(2) HCHO

(3) CH₃COCH₃

(4) None of these

Formaldehyde can be distinguished from acetaldehyde by:

1. Fehling's solution

2. Schiff's reagent

3. Ammonia

4. Ammoniacal AgNO₃

In Tischenko's reaction an aldehyde is heated with catalyst:

(1) NaOH

(2) Al(OC₂H₅)₃

(3) Al₂O₃

(4) Mg/Hg

Formalin is:

1. Formaldehyde

2. Formaldehyde+methanol

3. Formaldehyde+methanol+water

4. Formaldehyde+water

Doctors detect diabetes disease by testing the presence of glucose in urine with:

(1) Nessler's reagent

(2) Fehling's solution

(3) Fenton's reagent

(4) Silver nitrate solution