Hofmann Elimination

Q. 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is

1. 2-Ethoxypentane
2. Pent-1-ene
3. Cis-pent-2-ene
4. Trans-pent-2-ene

Q.
The alkene formed as a major product in the above elimination reaction is:

1. 
2. $C{H}_2=C{H}_2$
3. 
4. 

Q.

Identify the reagent(s) ‘A’ and condition(s) for the reaction:

1. A = HCl; Anhydrous AlCl₃

2. A = HCl, ZnCl₂

3. A = Cl₂, dark, Anhydrous AlCl₃

4. A = Cl₂; UV Light

Q. Which of the following can undergo in Hell-Volhard-Zelinsky Reaction?

1. $HCOOH$
2. $(C{H}_3{)}_{3}CCOOH$
3. $C_6{H}_{5}COOH$
4. $(C{H}_3{)}_{2}CHCOOH$

Q. Predict the major product of the following reaction:

And select the major product:

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

Q.
The products "A" and "B" formed in above reactions are:

1. 
2. 
3. 
4. 

Q. (a) $\left(C{H}_3{)}_{3}CCH\right(OH)C{H}_3\stackrel{conc.H_{2}S{O}_4}{⟶}$
(b) $\left(C{H}_3{)}_{2}CHCH\right(Br)C{H}_3\stackrel{alc.KOH}{⟶}$

Choose the correct statement regarding the given reactions:

1. Only (a) gives saytzeff product
2. Only (b) gives saytzeff product
3. Both (a) and (b) gives saytzeff product
4. Both (a) and (b) gives hofmann product

Q. Predict the major product of the following reaction:

And select the major product:

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

Q. Ethylamine on treatment with 3 equivalents of methyl iodide, followed by heating with aqueous Ag₂O will give ethene as the main product.

1. True
2. False

Q. Identify the set of reagent/reaction conditions 'X' and 'Y' in the following set reaction:

1. X = dilute aqueous NaOH, ${20}^{\circ }C;$ Y = HBr/acetic acid, ${20}^{\circ }C$
2. X = concentrated alcoholic NaOH, ${80}^{\circ }C;$ Y = HBr/acetic acid, ${20}^{\circ }C$
3. X = dilute aqueous NaOH, ${20}^{\circ }C,$ Y = $B{r}_2/CHC{l}_3,0^{\circ }C$
4. X = concentrated alcoholic NaOH, ${80}^{\circ }C;Y=B{r}_2/CHC{l}_3,0^{\circ }C$

Q.
Identify product 'P'

1. 
2. 
3. 
4. 

Q. R - I on reaction with excess $N{H}_3$ produces :

1. All the above
2. $1^{\circ }$ amine
3. $2^{\circ }$ amine
4. $3^{\circ }$ amine

Q. What is meant by ketal? Give an example of reaction(with mechanism) showing its formation.

Q. The final product(s) of the reaction is/are:

1. trimethyl amine
2. hexa-1, 4-diene
3. hexa-1, 5-diene
4. hexa-2, 5-diene

Q.
The alkene formed as a major product in the above elimination reaction is:

1. 
2. $C{H}_2=C{H}_2$
3. 
4. 

Q. Identify the product of the following reaction:

1. $C{H}_3-CH=C{H}_2$
2. 
3. $H_{2}O$
4. All of these

Q.

1. 
2. 
3. 
4. 

Q. Identify Z in the reaction sequences.
$C{H}_{3}C{H}_{2}CH=C{H}_2\underset{H_2{O}_2}{\overset{HBr}{\to }}Y\stackrel{C_2{H}_{5}OH}{\to }Z$

1. $C{H}_3(C{H}_2{)}_{2}C{H}_2-O-C_2{H}_5$
2. $(C{H}_3{)}_{3}CH-O-C_2{H}_5$
3. $C{H}_3(C{H}_2{)}_{3}C{H}_2-O-C{H}_3$
4. $C{H}_{3}C{H}_{2}CH\left(C{H}_3\right)-O-C_2{H}_5$

Q. Match the reactions of column I with the reaction mechanisms of column II:

Q.

1. $S{N}_1$
2. $E_1$
3. $E_2$
4. $E_{1cB}$

Q. For the reaction $N{O}_2+CO\to C{O}_2+NO$ the experimental rate expression is $-\frac{dc}{dt}=k[N{O}_2{]}^2$ the number of molecules of CO involves in the slowest step will be:

1. 0
2. 1
3. 2
4. 3

Q.
Identify product 'P'

1. 
2. 
3. 
4. 

Q. Identify the product of the following reaction:

1. 
2. $C{H}_3-CH=C{H}_2$
3. $H_{2}O$
4. All of these

Q. What do you understand by the term glycosidic linkage?

Q. Predict the major product of the following reaction:

And select the major product:

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

Q. Predict the major product of the following reaction:

And select the major product:

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

Q. Ethylamine on treatment with 3 equivalents of methyl iodide, followed by heating with aqueous Ag₂O will give ethene as the main product.

1. True
2. False

Q. Hofmann's bromamide reaction is to convert:

1. Acid to alcohol
2. Alcohol to acid
3. Amide to amine
4. Amine to amide