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Test: Preparation and Properties of Amines - JEE MCQ


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20 Questions MCQ Test - Test: Preparation and Properties of Amines

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Test: Preparation and Properties of Amines - Question 1

Which of the following pairs of reactants is most effective in forming an enamine?

Detailed Solution for Test: Preparation and Properties of Amines - Question 1
amine must be less sterically hindered. In option (b) and (c) amine is being used but due to more reactivity of aldehyde compared to cyclohexanone. Option (c) is correct.
Test: Preparation and Properties of Amines - Question 2

The general formula of Diazonium salt is:

Detailed Solution for Test: Preparation and Properties of Amines - Question 2

The correct answer is option A
The diazonium salts or diazonium compounds are the class of organic compounds with general formula R−N2+X. Here, X is an organic or inorganic anion (for example, Cl–, Br, BF4, etc.) and R is an alkyl or aryl group. The term is derived from two words. ‘Di 'refers to ‘two’, azo is indicative of ‘nitrogen’ and ium implies that it is cationic in nature.

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Test: Preparation and Properties of Amines - Question 3

;
compound (X) is:

Detailed Solution for Test: Preparation and Properties of Amines - Question 3
Test: Preparation and Properties of Amines - Question 4
In the following sequence of reactions, what is D?
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Test: Preparation and Properties of Amines - Question 5
An organic compound 'A'on treatment with gives ' ' which on heating gives ' ' when treated with in the presence of KOH produces ethylamine. Compound 'A' is:
Detailed Solution for Test: Preparation and Properties of Amines - Question 5
Since, when heated with in presence of produces ethylamine, hence it must be propanamide and hence the organic compound (A) will be propanoic acid. The reactions follows.

(A)
Test: Preparation and Properties of Amines - Question 6
An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound is
Detailed Solution for Test: Preparation and Properties of Amines - Question 6
Since the organic amino compound on reaction with nitrous acid at low temperature produces an oily nitrosoamine so the organic amino compound is a secondary aliphatic amines.
Test: Preparation and Properties of Amines - Question 7
Which of the following statements are correct ?
(i) In Sandmeyer reaction nucleophiles like and are indroduced in benzene ring in the presence of ion
(ii) In Gattermann reaction nucleophiles are introduced in benzene ring in the presence of copper powder and .
(iii) The yield in Gattermann reaction is found to be better than Sandmayer reaction.
Detailed Solution for Test: Preparation and Properties of Amines - Question 7
The yield in Sandmayer reaction is found to be better than Gattermann reaction.
Test: Preparation and Properties of Amines - Question 8
Consider the following sequence of reactions:
Compound
The compound is
Detailed Solution for Test: Preparation and Properties of Amines - Question 8
Test: Preparation and Properties of Amines - Question 9
The correct order of basicity of the following compounds
Detailed Solution for Test: Preparation and Properties of Amines - Question 9
Aliphatic amines are more basic than aromatic amines. Resonance decreases the basic character due to delocalisation of shared pair of electrons on nitrogen within benzene nucleus.
Test: Preparation and Properties of Amines - Question 10

Which of the following compounds is most basic?

Detailed Solution for Test: Preparation and Properties of Amines - Question 10


compound is most basic due to localized lone pair of electron on nitrogen atom while other compounds have delocalized lone pair of electron.

Test: Preparation and Properties of Amines - Question 11
Match the compounds given in List - I with their characteristic reactions given in List - II. Select the correct option.
Detailed Solution for Test: Preparation and Properties of Amines - Question 11
(1)
(ii) with (alcohol) and produces bad smell
(2)
(iii) gives white ppt with ammonical
(3)
(i) alkaline hydrolysis
(4)
(iv) with Lucas reagent cloudiness appears after 5 minutes
Test: Preparation and Properties of Amines - Question 12
Which reaction sequence would be best to prepare 3-chloroanilne from benzene?
Detailed Solution for Test: Preparation and Properties of Amines - Question 12


(a) When chlorination is done earlier than nitration, chlorobenzene formed at first step would introduce group in ortho-position, not in -position
(b) Again if group is reduced earlier than the chlorination step, group formed on reduction will again introduce in o-position
Test: Preparation and Properties of Amines - Question 13
The reduction of nitro compounds is most preferred in the presence of
Detailed Solution for Test: Preparation and Properties of Amines - Question 13
Reduction with iron scrap and hydrochloric acid is preferred because formed gets hydrolysed to release hydrochloric acid during the reaction. Thus, only a small amount of hydrochloric acid is required to initiate the reaction.
Test: Preparation and Properties of Amines - Question 14
The correct order of basicities of the following compounds is:
Detailed Solution for Test: Preparation and Properties of Amines - Question 14
Guanidine is most basic because its conjugate acid is stabilized by two equivalent resonance structures,

Further amines are more basic than , while amides
are least basic due to delocalisation of the lone pair of electrons on
Test: Preparation and Properties of Amines - Question 15
Which of the following reactions will not give a primary amine?
Detailed Solution for Test: Preparation and Properties of Amines - Question 15
(methyl isocyanide) on reduction with gives secondary amine.
Test: Preparation and Properties of Amines - Question 16
Indicate which nitrogen compound amongst the following would undergo Hoffmann reaction (i.e.., reaction with and strong ) to furnish the primary amine
Detailed Solution for Test: Preparation and Properties of Amines - Question 16
Only amides (i.e. ) in the present case undergo Hofmann bromamide reaction.


(Hofmann's bromamide reaction)
Test: Preparation and Properties of Amines - Question 17
Reagents capable of converting cyclohexanone to N-ethyl cyclohexylamine is
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Test: Preparation and Properties of Amines - Question 18
Which of the following gives propylamine upon hydrolysis?
Detailed Solution for Test: Preparation and Properties of Amines - Question 18
Amides are hydrolysed to give acids and or amines.
Test: Preparation and Properties of Amines - Question 19
Number of amines which will form colourful dye with and form azodye

Detailed Solution for Test: Preparation and Properties of Amines - Question 19
Amines I, IV, VII will form azo dye.
Test: Preparation and Properties of Amines - Question 20
Total Number of reactions in which product is amine
Detailed Solution for Test: Preparation and Properties of Amines - Question 20
I, II and IV.
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