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31 Year NEET Previous Year Questions: Amines - NEET MCQ


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40 Questions MCQ Test Chemistry Class 12 - 31 Year NEET Previous Year Questions: Amines

31 Year NEET Previous Year Questions: Amines for NEET 2024 is part of Chemistry Class 12 preparation. The 31 Year NEET Previous Year Questions: Amines questions and answers have been prepared according to the NEET exam syllabus.The 31 Year NEET Previous Year Questions: Amines MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Year NEET Previous Year Questions: Amines below.
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31 Year NEET Previous Year Questions: Amines - Question 1

Mark the correct statement [1985]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 1

Methyl amine is a stronger base than
ammonia due to +I effect. The alkyl groups
which are electron releasing groups increase
the electron density around the nitrogen
thereby increasing the availability of the lone
pair of electrons to proton or lewis acid and
making the amine more basic

31 Year NEET Previous Year Questions: Amines - Question 2

Indicate which nitrogen compound amongst thefollowing would undergo Hofmann reaction (i.e..,reaction with Br2 and strong KOH) to furnish theprimary amine (R – NH2)     [1989]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 2

Only 1° amides (i.e. RCONH2) in the present case undergo Hoffmann bromamide reaction.

(Hoffman's bromamide reaction)

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31 Year NEET Previous Year Questions: Amines - Question 3

For carbylamine reaction, we need hot alcoholic KOH and [1992]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 3

Any primary amine means both aliphatic as well as aromatic but  onoalkylamines means only 1° aliphatic amines. Therefore, option (a) is correct while (d) is wrong.

31 Year NEET Previous Year Questions: Amines - Question 4

What is the decreasing order of basicity of primary, secondary and tertiary ethylamines and NH3 ?  [1994]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 4

In the solution phase, amines follow the reactivity as 2°>3°>1°>NH3, provided the alkyl group is not methyl.

31 Year NEET Previous Year Questions: Amines - Question 5

Acetamide and ethylamine can be distinguishedby reacting with [1994]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 5

Acetamide and ethylamine can be
distinguished by heating with NaOH
solution. Acetamide evolves NH3 but
ethylamine does not.

31 Year NEET Previous Year Questions: Amines - Question 6

Which is formed, when acetonitrile is hydrolysedpartially with cold concentrated HCl? [1995]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 6

Methyl cyanide on treatment with conc. HCl give acetamide.

31 Year NEET Previous Year Questions: Amines - Question 7

When aniline reacts with oil of bitter almonds(C6H5CHO) condensation takes place andbenzal derivative is formed. This is known as         [1995]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 7

Benzaldehyde reacts with primary aromatic amine to form schiff's base

This is know as Schiff’s base reaction.

31 Year NEET Previous Year Questions: Amines - Question 8

Consider the following sequence of reactions :

The compound [A] is          [1996]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 8

31 Year NEET Previous Year Questions: Amines - Question 9

Aniline is an activated system for electrophilic substitution. The compound formed on heating aniline with acetic anhydride is [1996]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 9

Aniline when treated with acetic anhydride forms acetanilide (nucleophilic substitution)

31 Year NEET Previous Year Questions: Amines - Question 10

The compound obtained by heating a mixture ofa primary amine and chloroform with ethanolicpotassium hydroxide (KOH) is [1997]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 10

In this reaction, bad smelling compound ethyl isocyanide (CH3CH2NC) is produced. This equation is known as carbyl amine reaction.

31 Year NEET Previous Year Questions: Amines - Question 11

Aniline is reacted with bromine water and theresulting product is treated with an aqueoussolution of sodium nitrite in presence of dilutehydrochloric acid. The compound so formed isconverted into a tetrafluoroborate which issubsequently heated dry. The final product is           [1998]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 11

 

31 Year NEET Previous Year Questions: Amines - Question 12

An isocyanide is prepared by [1999]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 12

Carbylamine reaction :

31 Year NEET Previous Year Questions: Amines - Question 13

Which of the following reagents will convert pmethylbenzenediazoniumchloride into p-cresol?            [1999]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 13

31 Year NEET Previous Year Questions: Amines - Question 14

The consituent of the powerful explosive RDX is formed during the nitration of [2000]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 14

RDX is prepared by treating urotropine with fuming nitric acid. When the inner bridge system is destroyed by oxidation and the peripheral nitrogen atom are nitrated, it forms cyclonitrite (or RDX).

31 Year NEET Previous Year Questions: Amines - Question 15

Which of the following is most basic in nature?       [2000]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 15

(CH3)2NH is most basic because two electron releasing groups are present on Nitrogen. Also aromatic amines are less basic then aliphatic amines. The basic character of amines follow
the order
R2NH > RNH2 > C6H5NHCH3 > NH3

31 Year NEET Previous Year Questions: Amines - Question 16

[2000]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 16

31 Year NEET Previous Year Questions: Amines - Question 17

Intermediates formed during reaction of    with Br2 and KOH are    [2001]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 17

The mecahnism of Hoffmann bromide
reaction is

(i)

RCONH2 + Br2 →RCONHBr + HBr

(ii)

(iii)

(iv)

(v)

31 Year NEET Previous Year Questions: Amines - Question 18

Product 'P' in the above reaction is          [2002]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 18

31 Year NEET Previous Year Questions: Amines - Question 19

The final product C, obtained in this reaction 

would be

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 19

31 Year NEET Previous Year Questions: Amines - Question 20

Aniline when diazotized in cold and when treated with dimethyl aniline gives a coloured product. Its structure would be [2004]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 20

31 Year NEET Previous Year Questions: Amines - Question 21

Aniline in a set of reactions yielded a product D.

The structure of the product D would be: [2005]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 21

31 Year NEET Previous Year Questions: Amines - Question 22

The major organic product formed from the following reaction :

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 22

31 Year NEET Previous Year Questions: Amines - Question 23

Electrolytic reduction of nitrobenzene in weaklyacidic medium gives [2005]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 23

31 Year NEET Previous Year Questions: Amines - Question 24

Which of the following is more basic thananiline? [2006]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 24

Benzylamine is more basic than aniline. The reason is that in aniline, the lone pair of nitrogen is conjugated with benzene ring so it is not available readily for others. On the other hand in Benzylamine, nitrogen is not directly attached with ring so lone pairs are
not conjugated with ring.

31 Year NEET Previous Year Questions: Amines - Question 25

Which one of the following on reduction withlithium aluminium hydride yields a secondaryamine? [2007]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 25

Reduction of alkyl isocyanides in presence of LiAlH4 yields secondary amines containing methyl as one of the alkyl group.

whereas, alkyl cyanides give 1° amine on reduction.

31 Year NEET Previous Year Questions: Amines - Question 26

In a reaction of aniline a coloured product C was obtained.       [2008]

The structure of C would be :

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 26

The reaction can be completed as follows:

31 Year NEET Previous Year Questions: Amines - Question 27

Predict the product:       [2009]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 27

Secondary amine with (NaNO2 + HCl) gives nitroso product

31 Year NEET Previous Year Questions: Amines - Question 28

Nitrobenzene can be prepared from benzene byusing a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an:          [2009]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 28

Nitric acid acts as a base by accepting a proton.

31 Year NEET Previous Year Questions: Amines - Question 29

Aniline in a set of the following reactions yielded a coloured product ‘Y’ [2010]

The structure of ‘Y’ would be ;

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 29

31 Year NEET Previous Year Questions: Amines - Question 30

Acetamide is treated with the following reagentsseparately. Which one of these would yieldmethylamine? [2010]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 30

31 Year NEET Previous Year Questions: Amines - Question 31

Which of the following statements about primaryamines is ‘False’ ? [2010]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 31

Aryl amines do not produce phenol on
treatment with nitrous acid

31 Year NEET Previous Year Questions: Amines - Question 32

Match the compounds given in List - I with their characteristic reactions given in List - II. Select the correct option. [2010]

options :

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 32

(1) CH3 CH2 – CH2 – CH2 – NH2
(ii) with KOH (alcohol) and CHCl3
produces bad smell
(2) CH3C ≡ CH
(ii) gives white ppt with ammonical
AgNO3
(3) CH3 CH2 COOCH3
(i) alkaline hydrolysis
(4) CH3 CHOH – CH3
(iv) with Lucas reagent cloudiness
appears after 5 minutes

31 Year NEET Previous Year Questions: Amines - Question 33

In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D. [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 33

31 Year NEET Previous Year Questions: Amines - Question 34

What is the product obtained in the following reaction : [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 34

When nitro compound is reduced with a
neutral reducing agent (Zn dust + NH4Cl) the corresponding hydroxyl amine is formed

31 Year NEET Previous Year Questions: Amines - Question 35

Which of the following compounds is most basic?           [2011 M]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 35

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

31 Year NEET Previous Year Questions: Amines - Question 36

An organic compound (C3H9N) (A), when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C) which on reduction gave isopropylmethylamine. Predict the structure of (A).               [2012 M]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 36

31 Year NEET Previous Year Questions: Amines - Question 37

In the reaction

A is :        [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 37

31 Year NEET Previous Year Questions: Amines - Question 38

Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80 - 100°C forms which one of thefollowing products ? [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 38

31 Year NEET Previous Year Questions: Amines - Question 39

On hydrolysis of a “compound”, twocompounds are obtained. One of which ontreatment with sodium nitrite and hydrochloricacid gives a product which does not respond toiodoform test. The second one reduces Tollen’sreagent and Fehling’s solution. The “compound”is [NEET Kar. 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 39

Hydrolysis gives CH3CH2CH2NH2 +
HCOOH. On treatment with NaNO2 and
HCl former gives CH3CH2CH2OH which
does not give iodoform test. HCOOH gives  Tollen’s reagent test.

31 Year NEET Previous Year Questions: Amines - Question 40

Some reactions of amines are given. Which one is not correct ? [NEET Kar. 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Amines - Question 40

Secondary amine react with nitrous acid to give N-Nitrosoamines.

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