Chemical Properties of Amines

Q. Aniline does not undergo Friedel-Crafts reaction. Choose the correct option(s) regarding this statement.

1. Aniline forms salt with the Lewis acid catalyst i.e., AlCl₃, which is used in Friedel-Crafts reaction.
2. Nitrogen of aniline acquires positive charge and hence acts as a strong deactivating group for further reaction.
3. N-alkyl and N, N-dialkyl anilines undergo Friedel-Craft's reactions.
4. Positive charge on nitrogen is electron-donating and it activates the ring for further reactions.

Q.

Give simple chemical tests to distinguish between the following pairs of compounds.

(i) Propanal and Propanone

(ii) Acetophenone and Benzophenone

(iii) Phenol and Benzoic acid

(iv) Benzoic acid and Ethyl benzoate

(v) Pentan-2-one and Pentan-3-one

(vi) Benzaldehyde and Acetophenone

(vii) Ethanal and Propanal

Q.

What are the uses of amide?

Q.

Give a chemical test to distinguish between ethylamine and aniline.

Q. Methyl cyanide on treatment with magnesium bromide followed by subsequent hydrolysis gives :

1. Propanae
2. Ethanone
3. Ethanal
4. Propanal

Q. Reaction of trans- 2- phenyl-1-bromocyclopentane on reaction with alcoholic $KOH$ gives:

1. 4-Phenylcyclopentene
2. 3-Phenylcyclopentene
3. 2-Phenylcyclopentene
4. 1-Phenylcyclopentene

Q. What will be the product of the benzoylation of aniline?

1. Benzylamine
2. Diphenylamine
3. Phenyl benzoate
4. Benzanilide

Q. Reaction of carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

1. hydrocyanic acid
2. sodium hydrogen sulphite
3. a Grignard reagent
4. hydrazine in presence of feebly acidic solution

Q.

To prepare tert-butyl ethyl ether, the reagents required are:

1. Dimethyl ketone, ethylbromide and sodium

2. Sodium tert butoxide and ethyl bromide

3. Sodium ethoxide and tert-butyl bromide

4. Sodium propoxide and propyl bromide

Q.

Write the reactions of (i) aromatic and (ii) aliphatic primary amines with nitrous acid.

Q.

Arrange the following in decreasing order of their reactivity towards nucleophilic addition reaction.

CH₃COCH₃, CH₃CH₂CHO, HCHO, (CH₃)₂CHCHO

1. (CH₃)₂CHCHO > CH₃COCH₃ > HCHO > CH₃CH₂CHO

2. HCHO > CH₃CH₂CHO > (CH₃)₂CHCHO > CH₃COCH₃

3. CH₃COCH₀ > (CH₃)₂CHCHO > HCHO > CH₃CH₂CHO

4. HCHO > CH₃COCH₃ > CH₃CH₂CHO > (CH₃)₂CHCHO

Q. Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?
(i)
(ii)
(iii)
(iv)

1. Only (iv)
2. (i) and (ii)
3. (ii) and (iv)
4. (iii) and (iv)

Q. The foul smell produced during the carbylamine test and mustard oil test for primary amines are due to the formation of &
, respectively.

1. isocyanides
2. isothiocyanates
3. dithiocarbamic acid
4. isocyanates

Q. Which of the following catalyst is used in hydrogenation of vegetable oils?

1. $Fe$
2. $Zn/H_{2}O$
3. $Ni$
4. $Pd/CaS{O}_4$

Q. 40. How to convert benzaldehyde to benzophenone not in more than 2 steps?

Q. Diethylamine reacts with nitrous acid to give

1. (C₂H₅)₂NH⁺NO₂^-
2. C₂H₅OH
3. N₂ and alcohol
4. (C₂H₅)₂NNO

Q.

When acetaldehyde is oxidized with acidified potassium dichromate, it forms ________.

Q. Predict the reaction mechanism and product of the given reactions.

1. 
2. 
3. 
4. 

Q. When amines are treated with carboxylic acids at room temperature, aminoacids will be obtained.

1. True
2. False

Q. A given nitrogen containing aromatic compound $A$ reacts with $Sn/HCl$, followed by $HN{O}_2$ to give an unstable $B$. $B$ on treatment with phenol, forms a beautiful coloured compound $C$ with the molecular formula $C_{12}{H}_{10}{N}_{2}O$. The structure of compound $A$ is:

1. 
2. 
3. 
4. 

Q.

Which of the following reaction is not given by aniline?

1. Friedel-Crafts reaction

2. Sulphonation

3. Nitration

4. Bromination

Q. 3 When Cyclohexene reacts with SO2Cl2 , B is formed and then B is treated with LAH to form C. Find C.

Q. The product of the reaction is:

1. 
2. 
3. 
4. 

Q.

Which of the following amine gives diazonium salt on reaction with HNO₂?

1. (CH₃)₃N

2. (CH₃)₂NH

3. C₆H₅NH₂

4. CH₃NH₂

Q.

A primary amine, $RN{H}_2$ can be reacted with $C{H}_3-X$ to get secondary amine, $R-NHC{H}_3$ but the only disadvantage is that $3^{\circ }$ amine and quaternary ammonium salts are also obtained as side products. Can you suggest a method where $RN{H}_2$ forms only $2^{\circ }$ amine?

Q. The reagent used for converting tetrabromoethane into ethyne is:

1. Alcoholic KOH
2. Conc. $H_{2}S{O}_4\text{at}{170}^{o}C$
3. Aqueous potash
4. Zinc dust

Q. what is the final product (B) of this sequence ?

1. 
2. 
3. 
4. 

Q. Which of the following compounds reduce(s) ammoniacal silver nitrate solution?
$C_6{H}_{5}CHO$
$C{H}_{3}C{H}_{2}CHO$
$C{H}_{3}C{H}_{2}OH$
$C{H}_{3}CH\left(OH\right)COC{H}_3$

1. $C{H}_{3}CH\left(OH\right)COC{H}_3,C{H}_{3}C{H}_{2}CHO,C_6{H}_{5}CHO$
2. $C{H}_{3}C{H}_{2}OH,C_6{H}_{5}CHO,C{H}_{3}CH\left(OH\right)COC{H}_3$
3. $C{H}_{3}C{H}_{2}OH,C{H}_{3}C{H}_{2}CHO,C{H}_{3}CH\left(OH\right)COC{H}_3$
4. $C_6{H}_{5}CHO,C{H}_{3}C{H}_{2}CHO$

Q. Choose the incorrect statement(s) from the following:

1. N, N-Diethylbenzenesulphonamide is soluble in alkali.
2. Hinsberg's reagent reacts with primary, secondary and tertiary amines.
3. Diethylamine on treatment with carbon disulphide followed by excess of mercuric chloride will produce an isothiocyanate having pungent smell.
4. Secondary amine on reaction with CS₂ will give dithiocarbamic acid which fail to react with mercuric chloride.

Q. On reacting with grignard reagent acetone gives?

1. $1^o$ alcohol
2. $2^o$ alcohol
3. $3^o$ alcohol
4. None of these