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Test: Organic Compounds Containing Nitrogen

20 Questions MCQ Test Topic-wise MCQ Tests for NEET | Test: Organic Compounds Containing Nitrogen

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Attempt Test: Organic Compounds Containing Nitrogen | 20 questions in 30 minutes | Mock test for NEET preparation | Free important questions MCQ to study Topic-wise MCQ Tests for NEET for NEET Exam | Download free PDF with solutions

QUESTION: 1

The following reaction takes place in the presence of

A.
NaOH/Pd
B.
H₂/Pd
C.
HCl/Pd
D.
None of these

Solution:

−NO₂ group is reduced to –NH₂ using H₂/Pd.

QUESTION: 2

The molecular formula of ethyl acetate is

A.
C₄H₈O
B.
C₄H₈O₂
C.
C₅H₁₀O₂
D.
C₅H₈O₂

Solution:

Its molecular formula is C₄H₈O₂

QUESTION: 3

Which of the following is a tertiary amine?

A.
Diphenhydramine
B.
Adrenaline
C.
Ephedrine
D.
Novocaine

Solution:

Diphenhydramine is an antihistamine mainly used to treat allergies. It can also be used for insomnia, symptoms of the common cold, tremor in parkinsonism, and nausea. It is used by mouth, injection into a vein, injection into a muscle, or applied to the skin.

QUESTION: 4

Nitro compounds are reduced by iron scrap and hydrochloric acid to yield one of the following compounds.

A.
Amines
B.
Esters
C.
Amides
D.
Nitriles

Solution:

RNO₂+Fe/HCl ->RNH₂

QUESTION: 5

Which one of the following is used to increase blood pressure

A.
Ephedrine
B.
Novocain
C.
Benadryl
D.
None of these

Solution:

Ephedrine is used to increase blood pressure

QUESTION: 6

Which of the following is a tertiary amine?

A.
cyclohexylamine
B.
N,N – dimethylaniline
C.
N – ethyl – 1 – propanamine
D.
3 – pentanamine

Solution:

C₆H₅N(CH,)₂ this is tertiary amine.

QUESTION: 7

When methylamine reacts with HCl the product is

A.
methyl ammonium chloride
B.
methane and methyl chloride
C.
methonoate chloride
D.
methylammonia

Solution:

MeNH₂ reacts with HCl to form salt.

QUESTION: 8

For producing amines, the reaction of nitro compounds with iron scrap is preferred because

A.
HCl is very cheap
B.
HCl is formed on hydrolysis of FeCl₂
C.
Not too much HCl is formed in the reaction
D.
Nitro compounds are easily available

Solution:

This reaction is preferred because on reduction of nitro compouns to amine , Fe will get oxidize to Fe(II) a which on hydrolysis will produce HCl which is required in the reaction

QUESTION: 9

Diazonium salts are used in the preparation of

A.
Hormones
B.
Vitamins
C.
Dyes
D.
Proteins

Solution:

Diazonium reacts with phenols and napthols to form dyes.

QUESTION: 10

When pyridine is treated with a mixture of nitric and sulfuric acids, the major product is:

A.
3 – aminopyridine
B.
2 – nitropyridine
C.
3 – nitropyridine
D.
4 – aminopyridine

Solution:

In pyridine EAS take splace at 3 position.

QUESTION: 11

Direct nitration of aniline yields significant amount of meta derivative. To obtain more p – nitro derivative, one or more of the below can be done

A.
reacting with acetic anhydride
B.
acetylation reaction
C.
controlling the nitration reaction
D.
all of these

Solution:

Meta isomer form because of converstion of aniline to anilium ion which is META director. This can be prevented by acetylation of anilie by reaction with acetyl chloride or acetylanhydride.

QUESTION: 12

Quaternary ammonium salt is formed

A.
by serial nucleophilic substitution of the product
B.
By treating an alkyl or benzyl halide with ammonia
C.
By nucleophilic substitution reaction
D.
all of these

Solution:

QUESTION: 13

Which of the following amines is most soluble in water?

A.
(CH₃CH₂CH₂)₂NH
B.
ethylamine
C.
pyrrolidine
D.
(CH₃CH₃)₃N

Solution:

Because to maximum hydrogen bonding.

QUESTION: 14

Sec – Butylamine is the common name of what compound?

A.
2 – butanamine
B.
N – ethylethanamine
C.
1 – butanamine
D.
N – methyl – 1 – propanamine

Solution:

IUPAC is 2-butanamine.

QUESTION: 15

Aniline does not undergo Friedel – Crafts reaction

A.
Anilium ion deactivates any further reaction.
B.
aluminium chloride, the catalyst reacts with NH₂ group
C.
nitrogen of aniline acquires positive charge
D.
all of these

Solution:

NH₂ has lp of electron which reacts with AlCl₃ or other catalyst that we add to form anilium ion.

QUESTION: 16

The main product formed by treating an alkyl or benzyl halide with excess ammonia

A.
Mixed
B.
Tertiary
C.
Secondary
D.
Primary

Solution:

The major product is primary amine.

QUESTION: 17

The Hofmann elimination proceeds via a(n) __________ pathway.

A.
SN₂
B.
E₂
C.
E₁
D.
SN₁

Solution:

Hoffmann elimination follows E₂ mechanism.

QUESTION: 18

Arrange the following in order of increasing basicity: aniline, p – nitroaniline, p – toluidine,and p – methoxyaniline

A.
p – methoxyaniline p – nitroaniline < aniline < p – toluidine
B.
p – nitroaniline < aniline < p – toluidine < p – methoxyaniline
C.
aniline < p – methoxyaniline p – nitroaniline < p – toluidine
D.
p – nitroaniline < aniline< p – methoxyaniline < p – toluidine

Solution:

-OMe group at p position will increase the basicity more tha normal –CH₃ group at p position. While presence of –NO₂ at position will decrease the basicity.

QUESTION: 19

Aniline does not undergo Friedel – Crafts reaction