Reactions of Aryl Amines (Diazo Salts)

Q.

Butanenitrile may be prepared by heating -

1. Butyl Alcohol with $\mathrm{KCN}$

2. Propyl Alcohol with $\mathrm{KCN}$

3. Butyl Chloride with $\mathrm{KCN}$

4. Propyl Chloride with $\mathrm{KCN}$

Q.

Phenyl isocyanide is formed when chloroform is treated with alcoholic potassium hydroxide and:

1. Benzaldehyde

2. Aniline

3. Phenol

4. Nitrobenzene

Q. Acylation of amines with acyl halides proceeds by which of the following reaction?

1. electrophilic addition
2. electrophilic substitution
3. nucleophilic addition
4. nucleophilic substitution

Q. At what pH does phenol react with benzene diazonium chloride to give a coupling product?

1. pH = 2
2. pH = 3
3. pH = 9
4. pH = 7

Q. is used as dehydrating agent in laboratory.

1. Calcium chloride
2. Sodium chloride
3. Sodium carbonate

Q.

What happens in the following reaction?

1. No reaction happens as tertiary amines do not react with $HONO$

2. There is a nucleophilic aromatic substitution

3. The product is based on Hofmann elimination

4. There is an electrophilic aromatic substitution

Q. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives ___.

1. diphenyl ether
2. p-hydroxyazobenzene
3. chlorobenzene
4. benzene

Q. Schemes 1 and 2 describe the conversion of P to Q and R to S respectively. Scheme 3 describes the synthesis of T from Q and S. The total number of Br atoms in a molecule of T is:

Q. p-Chloro aniline and anilinium chloride can be distinguished by:

1. Sandmeyer reaction
2. Carbylamine reaction
3. Hinsberg’s reaction
4. $AgN{O}_3$

Q. $p-toluidine\underset{HCl,0{}^{o}C}{\overset{NaN{O}_2}{\to }}X\underset{H_{2}O}{\overset{H_{3}P{O}_2}{\to }}Y\underset{H^{+}}{\overset{KMn{O}_4,\Delta }{\to }}Z$
In the given sequence:

1. Z is benzoic acid
2. Z is benzaldehyde
3. Z is toluene
4. Z is 4-aminobenzoic acid.

Q. Arrange the following amides according to their relative reactivity when reacted with $B{r}_2$ in excess of strong base:

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

Q. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives ___.

1. diphenyl ether
2. p-hydroxyazobenzene
3. chlorobenzene
4. benzene

Q. The final product C, obtained in this reaction is:

1. 
2. 
3. 
4. 

Q.

$Ar{\stackrel{\oplus }{N}}_2\stackrel{\ominus }{Cl}+C{H}_{3}C{H}_{2}OH⟶ArH+N_2+y+HCl$
The number of $\pi$ and $\sigma$ bonds in 'y' are:

1. $1,6$

2. $1,5$

3. $2,4$

4. $2,6$

Q.

The colour of 'C' in the following is

1. Blue
2. Yellow
3. Orange
4. Green

Q.

About 'X' and 'Y' the correct statements are

I. 'X' is inorganic acid 'Y' on oxidation with acidified KMnO₄ gives organic acid

II. In 'X' central atom exhibit sp³ and in 'Y' 1^st and 2^nd carbon exhibit sp² and sp³ hybridisations

III. Both 'X' and 'Y' acts as reducing agents

IV. Both 'X' and 'Y' are oxidized products in the reaction

1. I, II only
2. II, III, IV only
3. I, III, IV only
4. All

Q. In the diazotisation of aniline with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to :

1. Suppress the concentration of free aniline available for coupling
2. Suppress hydrolysis of phenol
3. Insure a stoichiometric amount of nitrous acid
4. Neutralize the base liberated

Q. $\text{Ethylamine}\stackrel{HN{O}_2}{\to }\left(A\right)\stackrel{PC{l}_3}{\to }\left(B\right)\stackrel{KCN}{\to }\left(C\right)$

The end product of the reaction would be:

1. Propanenitrile
2. Triethylamine
3. Diethylamine
4. Propylamine

Q. What would be the product of the given reaction?

1. 
2. 
3. 
4. 

Q. In the following reaction sequence,
Considering only the para substituted product (P), which of the following options is correct?

1. (R) is p-aminophenylethanoate
2. (Q) forms a zwitter-ion
3. (R) has high anti-inflammatory properties
4. (R) is N-acetyl-p-aminophenol

Q. Which of the following statement is true?

1. Negative catalyst is also called inhibitors
2. Positive catalyst will increase the rate of a reaction
3. Negative catalyst will decrease the rate of a reaction
4. All of the above

Q. In the reaction, product (C) is :

1. $C_6{H}_{5}N{H}_2$
2. $C_6{H}_{5}COOH$
3. $C_6{H}_{5}OH$
4. None of these

Q. Identify 'Z' in the sequence:

$C_6{H}_{5}N{H}_2\underset{273K}{\overset{NaN{O}_2+HCl}{\to }}X\stackrel{CuCN}{\to }Y\underset{H^{+}/H_{2}O}{\overset{Boil}{\to }}$

1. 
   $C_6{H}_{5}CN$
2. 
   $C_6{H}_{5}CON{H}_2$
3. 
   $C_6{H}_{5}COOH$
4. 
   $C_6{H}_{5}C{H}_{2}N{H}_2$

Q. The product formed on the reaction of chloroform with aniline and alcoholic $KOH$ is:

1. Phenyl cyanide
2. Phenyl isocyanide
3. Chlorobenzene
4. Phenol

Q. Consider the reactions:
(i) $(C{H}_3{)}_{2}CHC{H}_2-Br\stackrel{C_2{H}_{5}OH}{\to }(C{H}_3{)}_{2}CHC{H}_2-O{C}_2{H}_5+HBr$
(ii) $(C{H}_3{)}_{2}CHC{H}_2-Br\stackrel{C_2{H}_5{O}^{-}}{\to }(C{H}_3{)}_{2}CHC{H}_2-O{C}_2{H}_5+B{r}^{-}$
The mechanisms of reactions (i) and (ii) are respectively

1. $S_{N}1\text{and}{S}_{N}1$
2. $S_{N}2\text{and}{S}_{N}1$
3. $S_{N}2\text{and}{S}_{N}2$
4. $S_{N}1\text{and}{S}_{N}2$

Q. Which of the following statement is true?

1. Negative catalyst will decrease the rate of a reaction
2. Positive catalyst will increase the rate of a reaction
3. Negative catalyst is also called inhibitors
4. All of the above

Q. In the following reaction sequence the amount of D (in g) formed from 10 moles of acetophenone is : (Atomic weight in $gmo{l}^{-1}$ H=1, C=12, N=14, O=16, Br=80. The yield (%) corresponding to the product in each step is given in the parenthesis)

Q. On reaction with $HN{O}_2$ which of the following amines yield a yellow oily product?

1. 
2. 
3. 
4.