Curtius and Hofmann Rearrangements

Q. Hoffmann degradation of 3-bromobenzamide gives:

1. Bromobenzene
2. Bromoethyl Benzene
3. 3-Bromoaniline
4. Aniline

Q.

Acetamide changes into methylamine by

1. Hinsberg reaction

2. Hofmann bromamide reaction

3. Hofmann reaction

4. Friedel-Craft's reaction

Q. Reaction of Acetamide with bromine water and KOH gives

1. CH₃CH₂NH₂
2. CH₃COOH
3. CH₃COONH₄
4. CH₃NH₂

Q.

Intermediates formed during the reaction RCONH₂ with Br₂ and KOH are

1. RCONBr₂

2. RNHCOBr and RNCO

3. RNH - Br and RNCO

4. RCONHBr and RNCO

Q.

In the above reactions the compound 'A' is

1. Acetamide

2. Ethanoic acid

3. Propanoic acid

4. Butanoic acid

Q. Which of the following reactions is appropriate to convert acetamide to methanamine?

1. Stephen's reaction
2. Gabriel synthesis
3. Carbylamine reaction
4. Hofmann bromamide degradation

Q.

In Hofmann bromamide degradation, one of the important steps is the migration of

1. An alkyl group with its electron pair to electron deficient N atom

2. an alkyl group without its electron pair to electron deficient N atom

3. an alkyl group with its electron pair to electron deficient O atom

4. An alkyl group with its electron pair to electron rich N atom

Q.

Z is

1. A single compound

2. A mixture of four compounds

3. A mixture of two compounds

4. A mixture of three compunds

Q.

$(C{H}_3{)}_{3}C-\stackrel{\stackrel{O}{||}}{C}-N{H}_2\underset{\left(ii\right)D_{2}O}{\overset{\left(i\right)O{D}^{-}/B{r}_2}{\to }}$ Product P is

1. $(C{H}_3{)}_{3}CN{H}_2$

2. $(C{H}_3{)}_{3}CNHD$

3. $(C{H}_3{)}_{3}CN{D}_2$

4. No reaction

Q. Which of the following is not a usual method for the preparation of primary amines?

1. Curtius method
2. Gabriel phthalimide reaction
3. Hofmann’s method
4. Reductive amination of carbonyls