Synthesis of Amides

Q. The product obtained in the reaction of diborane with excess of ammonia at low temperature is:

1. $B_2{H}_6.2N{H}_3$
2. $(BN{)}_x$
3. Borazine
4. $B_2{H}_6.N{H}_3$

Q. In the Hoffmann-Bromamide rearrangement, intermediate compounds are:

1. $R-\mathrm{CONHBr}$
2. All of these
3. $R-N=C=O$
4. $\left(R-\mathrm{CO}-\stackrel{}{\stackrel{-}{N}-\mathrm{Br}}\right]\stackrel{+}{Na}$

Q. In a set reaction, acetic acid yields a product S. The compound S would be:
$C{H}_{3}COOH\stackrel{SOC{l}_2}{\to }P\underset{Anhy.AlC{l}_3}{\overset{\text{Benzene}}{\to }}Q\stackrel{HCN}{\to }R\stackrel{H_3{O}^{+}}{\to }$

1. 
2. 
3. 
4. 

Q. Which of the following gives 2, 3-dimethyl but-2-ene?

1. $\text{2, 3-dimethylbutan-1-ol}\underset{\Delta }{\overset{H_{2}S{O}_4}{\to }}$
2. $\text{2, 3-dimethylbutan-2-ol}\underset{\Delta }{\overset{H_{2}S{O}_4}{\to }}$
3. $\text{2, 3-dimethyl -1-bromobutane}\stackrel{alcKOH}{\to }$
4. $\text{2, 3-dimethyl -2-bromobutane}\stackrel{alcKOH}{\to }$

Q. Which of the following test is not shown by acetaldehyde?

1. Lucas test
2. Benedict’s test
3. Tollen’s test
4. Fehling's test

Q. Acetic anhydride reacts with excess of ammonia to form

1. $2C{H}_{3}COON{H}_4$
   
2. $2C{H}_{3}CON{H}_2$
   
3. $C{H}_{3}CON{H}_2+C{H}_{3}COON{H}_4$
4. $2C{H}_{3}COOH$

Q. Compound Y is

1. $BiOCl$
2. $K_4\left[Co\right(CN{)}_6]$
3. $K_2\left[Zn\right(CN{)}_4]$
4. $Mn(CN{)}_2$

Q. n-Propyl alchohol is obtained on hydrolysis of the adduct obtained by the reaction of:

1. $EtMgX$ and $HCHO$
2. $MeMgX$ and $(C{H}_2{)}_{2}O$
3. $EtMgX$ and $O_2$
4. $MeMgX$ and $C{H}_{3}CHO$

Q. Hofmann rearrangement is given by

1. Primary amides
2. Acid chloride
3. Acid anhydride
4. Cyclic ketones

Q. Acetic anhydride reacts with excess of ammonia to form

1. $C{H}_{3}CON{H}_2+C{H}_{3}COON{H}_4$
2. $2C{H}_{3}COOH$
3. $2C{H}_{3}CON{H}_2$
   
4. $2C{H}_{3}COON{H}_4$
   

Q.
What is the end product?

1. 
2. 
3. 
4. 

Q. The compound (D) is:

1. $RCOOH$
2. $RC{H}_{2}OH$
3. $RCN$
4. $RCHO$

Q.

Name the following rearrangement:

1. Fries rearrangement

2. Claisen rearrangement

3. Cope rearrangement

4. Beckmann rearrangement

Q. Predict the products of the following reactions:

$\left(i\right)C{H}_3-\underset{\underset{C{H}_3}{|}}{C}=O\stackrel{HCN}{\to }?$

$\left(ii\right)C_6{H}_5-C{H}_2-C{H}_3\underset{\left(b\right)H^{+}}{\overset{\left(a\right)KMn{O}_4/KOH}{\to }}?$

$\left(iii\right)C{H}_{3}COOH\stackrel{N{H}_3/\Delta }{\to }?$

Q. Prolonged hydrolysis of nitriles under vigorous conditions yeild amides

1. True
2. False

Q. When $N{H}_{4}Cl$ is treated with $CaO$ we get $CaC{l}_2,Ca(OH{)}_2$and$X$ as its products. Where X is :

1. ammonia
2. carbon dioxide
3. quick lime
4. water

Q.

Consider the following reactions & identify C:

1. 
2. 
3. 
4. 

Q. The product of the following reaction is :

1. 
2. 
3. 
4. 

Q. Rearrangement of an oxime to an amide in presence of strong acid is called:

1. Curtius rearrangement
2. Fries rearrangement
3. Beckmann rearrangement
4. Sandmeyer reaction

Q. A compound with molecular mass $180$ is acylated with $C{H}_{3}COCl$ to get a compound with molecular mass $390$. The number of amino groups present per molecule of the former compound is

1. $5$
2. $6$
3. $4$
4. $2$

Q. Which reagent is appropriate to accomplish this conversion?

1. $H_{3}P{O}_2/H_{2}O$
2. $H_{3}P{O}_3/H_{2}O$
3. $H_{3}P{O}_4/H_{2}O$
4. All of the above

Q. To prepare $3-\text{ethylpentan}-3-\text{ol}$, the reactants needed are-

1. $C{H}_{3}C{H}_{2}MgBr+C{H}_{3}COC{H}_{2}C{H}_3$
2. $C{H}_{3}MgBr+C{H}_{3}C{H}_{2}C{H}_{2}COC{H}_{2}C{H}_3$
3. $C{H}_{3}C{H}_{2}MgBr+C{H}_{3}C{H}_{2}COC{H}_{2}C{H}_3$
4. $C{H}_{3}C{H}_{2}C{H}_{2}MgBr+C{H}_{3}COC{H}_{2}C{H}_3$

Q. What is use of formaline?

Q. n-Propyl alchohol is obtained on hydrolysis of the adduct obtained by the reaction of:

1. $EtMgX$ and $HCHO$
2. $MeMgX$ and $(C{H}_2{)}_{2}O$
3. $EtMgX$ and $O_2$
4. $MeMgX$ and $C{H}_{3}CHO$

Q. Acetone forms a condensation compound when treated with chloroform. The compound is

1. Mesitylene
2. Ketol
3. Phorone
4. Chloretone

Q.
The product of the reaction is:

1. 
2. 
3. 
4. 

Q. Which of the following is a Sanger reagent?

1. $2,4$ - Di-nitro flurobenzene
2. Phenyl isocyanate
3. $2,4$ - Di-nitro iodobenzene
4. $2,4$ - Di-nitro Chlorobenzene

Q. Identify 'A' and 'B' in the following reaction and rewrite the complete reaction.
$C{H}_3-C{H}_2-Br+AgCN\stackrel{\Delta }{\to }A\stackrel{\frac{Na}{C_2{H}_{5}OH}}{\to }B$.
Explain Hoffmann bromamide degradation reaction.

Q.

Consider the following reactions & identify C:

1. 
2. 
3. 
4. 

Q. Hofmann rearrangement is given by

1. Primary amides
2. Acid chloride
3. Acid anhydride
4. Cyclic ketones