The Cannizaro Reaction

Q. The Cannizzaro's reaction is not given by:

1. Trimethyl acetaldehyde
2. Acetaldehyde
3. Formaldehyde
4. Benzaldehyde

Q.

Write chemical reaction for the preparation of phenol from chlorobenzene.

Q.

How do you convert chlorobenzene to phenol?

Q. p-Cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form the compound B. The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is

1. 
2. 
3. 
4. 

Q. The relative rate of acid catalysed dehydration of following alcohols would be

1. I > III > IV > II
2. III > I > IV > II
3. III > IV > I > II
4. III > IV > I > II

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

1. Perkin reaction

2. Claisen reaction

3. Cannizzaro reaction
4. Knoevenagel reaction

Q.

Sodium phenoxide when heated with ${\mathrm{CO}}_2$ under pressure at $125°\mathrm{C}$produces ______.

1. Salol

2. Salicylaldehyde

3. Sodium benzoate

4. Sodium Salicylate

Q. Which of the following compounds have the least reactivity towards electrophilic aromatic substitution?

1. 
2. 
3. 
4. All have equal reactivity towards electrophilic aromatic substitution.

Q.

Which of the following is used as a solvent in the Friedel Crafts reaction?

1. Benzene

2. Methane

3. Nitrobenzene

4. Hydrochloric acid

Q.

An alkyl halide reacts with alcoholic ammonia in a sealed tube, and the product formed will be:

1. Primary amine

2. Secondary amine

3. Tertiary amine

4. All of these

Q.

What is dissociation reaction?

Q.

What is the product of the reaction of ${\mathrm{H}}_2{\mathrm{O}}_2$ with ${\mathrm{Cl}}_2$

1. $\mathrm{HCl}+{\mathrm{H}}_2$

2. ${\mathrm{H}}_2\mathrm{O}+\mathrm{HCl}$

3. ${\mathrm{O}}_2+\mathrm{HOCl}$

4. $\mathrm{HCl}+{\mathrm{O}}_2$

Q.

An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of $1mL$ of $3\%$ ${\mathrm{H}}_2{\mathrm{O}}_2$, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium $\left(VI\right)$ compound ‘$X$’. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of $X$.

Q. An aldehyde which undergoes Cannizzaro’s reaction and reduces Schiff’s reagent but does not reduce Fehling’s solution is:

1. CH₃CHO
2. HCHO
3. C₆H₅CHO
4. salicylaldehyde

Q. The intermediate in Cannizaro reaction which is the best hydride donor is :

1. 
2. 
3. 
4. 

Q.

How do you convert Benzaldehyde to Benzophenone?

Q. Find the major product for the given reaction?

1. 
2. 
3. 
4. None of the above

Q.

Which of the following reaction is an example of ammonolysis?

1. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CN}\to {\mathrm{C}}_6\mathrm{H}5\mathrm{CH}2{\mathrm{CH}}_2{\mathrm{NH}}_2$

2. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}+{\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2\to {\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CONHC}}_6{\mathrm{H}}_5$

3. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{Cl}+{\mathrm{NH}}_2\to {\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2{\mathrm{NH}}_2$

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2\to {\mathrm{C}}_6{\mathrm{H}}_5{{\mathrm{NH}}_3}^{+}{\mathrm{Cl}}^{-}$

Q. Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide?

1. 
2. 
3. 
4. 

Q. An Organic compounds 'A' $C_4{H}_8$ on treatment with $KMn{O}_4/H^{+}$ yields compound 'B' $C_3{H}_{6}O$. Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is

1. 1-Methylcyclopropane
2. 2-Methylpropene
3. Cyclobutane
4. But-2-ene

Q.

Describe the following.
Acetylation

Cannizzaro reaction

Cross aldol condensation

Decarboxylation

Q. Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the main product?

1. 
2. 
3. 
4. 

Q. The difference between aldol condensation and Cannizzaro’s reaction is that:

1. the former takes place in the absence of α-H-atom
2. none of the above
3. the former takes place in the presence of α-H-atom
4. the former takes place in the presence of β-H-atom

Q.

In which of the following reactions, new carbon-carbon bond is not formed?

1. Cannizzaro’s reaction

2. Aldol condensation

3. Claisen’s reaction

4. Friedel-Crafts reaction

Q.

What do you observe when acetic acid neutralizes ${\text{FeCl}}_3$ solution?

Q. Important organic name reaction

Q. The total number of carboxylic acid groups in the final product is___

Q.

An organic compound with the molecular formula $C_9{H}_{10}O$ forms 2, 4 - DNP derivative, reduces Tollen's reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2 - benzene diearboxylic acid. Identify the compound.

Q.

How to convert benzaldehyde to benzophenone?

Q.

How is the presence of SO₂ detected?