Question Set D

cbse 12th Standard Chemistry Amines Important Questions And Answers Study Material - QB365

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Questions:

Multiple Choice Question

45 x 1 = 45

What is the correct IUPAC name of the given Compound?

(a)

2, 2-dimethylbutanoic acid

(b)

2-carboxyl-2-methylbutane

(c)

2-ethyl-2-methylpropanoic acid

(d)

3-methylbutane carboxylic acid

Benzene diazonium chloride on hydrolysis gives.

(a)

Phenol

(b)

Chlorobenzene

(c)

Benzene

(d)

Aniline

Among the following which is the strongest base?

(a)

(b)

(c)

(d)

IUPAC name of product formed by reaction of methylamine with two moles of ethyl chloride

(a)

N,N-dimethylethanamine

(b)

N,N-diethylmethanamine

(c)

N-methylethanamine

(d)

N-ethyl, N-methylethanamine

Propanamide on reaction with bromine in aqueous NaOH gives

(a)

propanamine

(b)

ethanamine

(c)

N-methylethanamine

(d)

propanenitrile

Which of the following should be most volatile?
(I) CH₃CH₂CH₂NH₂
(II) (CH₃)₃N

(IV) CH₃CH₂CH₃

(a)

(b)

(c)

(d)

III

The reaction of P:Toluidine with CHCl₃ and KOH gives

(a)

(b)

(c)

(d)

(a)

\(\beta\)-Alanine

(b)

\(\alpha\)-Alanine

(c)

Ethylene diamine

(d)

Oxamide

An organic compound C₇H₉N forms clear solution when dissolved in KOH after reacting with C₆H₅SO₂Cl, 'A' on diazotisation at OQC and then reaction with \(\beta\)-naphthol gives orangish red dye. 'A' on electrophilic substitution gives single product. 'A' is

(a)

4-Methyl aniline

(b)

2-Methyl aniline

(c)

3-Methyl aniline

(d)

N-Methyl aniline

10.

Compound can be prepared by the reaction of _____________

(a)

Phenol and benzoic acid in the presence of NaOH

(b)

Phenol and benzoyl chloride in the presence of pyridine

(c)

Phenol and benzoyl chloride in the presence of ZnCI₂

(d)

Phenol and benzaldehyde in the presence of palladium

11.

D. 'D' is

(a)

(b)

(c)

(d)

12.

Which of the following group (s) increases basic strength of substituted aniline?

(a)

\(\text {-OCH }_{\text {3 }}\)

(b)

\(-\mathrm{CH}_{3}\)

(c)

\(-\mathrm{SO}_{3}\)

(d)

Both (a) and (b)

13.

The correct name for yellow dye is

(a)

p-hydroxy azobenzene

(b)

p-amino azobenzene

(c)

o-hydroxyazobenzene

(d)

o-amino azobenzene

14.

The reaction, \(\begin{equation} \mathrm{ArN}_{2}^{+} \mathrm{Cl}^{-} \stackrel{\mathrm{Cu} / \mathrm{HCl}}{\longrightarrow} \mathrm{ArCl}+\mathrm{N}_{2}+\mathrm{CuCl} \end{equation}\) is named as

(a)

Sandmeyer reaction

(b)

Gattermann reaction

(c)

Claisen reaction

(d)

Carbylamine reaction

15.

Which of the following reagent is required for the following conversion?

(a)

CH₃NH₂CH₃CI

(b)

CH₃CI,RNH₂

(c)

NH₃, CH₃CI

(d)

CH₃CH₂NH₂

16.

What would be the side products formed with primary amine in the Hofmann bromamide degradation reaction?

(a)

Na₂CO₃ + NaBr

(b)

NaBr + H₂O + NaOH

(c)

NaBr + H₂O + Na₂CO₃

(d)

Br₂ + H₂O + Na₂CO₃

17.

What is the common name of

(a)

Aniline

(b)

Benzenamine

(c)

Toluidine

(d)

None of these

18.

Which of the following is a 3° amine?

(a)

1-methylcyclohexylarnine

(b)

Triethylamine

(c)

tert-butylarnine

(d)

N-methylaniline

19.

Ethyne + H₂O Product formed in the given reaction is

(a)

benzaldehyde

(b)

acetaldehyde

(c)

ethanoic acid

(d)

ethanoyl chloride

20.

What is the by-product formed in this reaction

(a)

NaHCO₃

(b)

CO₂

(c)

Na₂HCO₃

(d)

Na₂CO₃

21.

Select the acid(s) which cannot be prepared by Grignard reagent?

(a)

Acetic acid

(b)

Succinic acid

(c)

Formic acid

(d)

All of these

22.

p-Chloroaniline and anilinium hydrochloride can be distinguished by

(a)

Sandmeyer reaction

(b)

NaHCO₃ solution

(c)

AgNO₃ solution

(d)

Carbylamine reaction

23.

In the diazotisation of arylamine, the use of nitrous acid

(a)

suppresses hydrolysis of phenol

(b)

is a source of electropholic nitrosonium ion

(c)

neutralise the base liberated

(d)

all of the above

24.

The compound that will react most ready with NaOH to form methanol is

(a)

(CH₃)₄N⁺I^-

(b)

CH₃OCH₃

(c)

(CH₃)₃S⁺I^-

(d)

(CH₃)₃CCI

25.

Amino group is ortho-, para-directing for aromatic electrophilic substitution. On nitration of aniline, good amount of m-nitroaniline is obtained. This is due to

(a)

In nitration mixture, ortho, para-activity of NH₂ group is completely lost

(b)

-NH₂ becomes \(-{ NH }_{ 3 }^{ + }\), which is m-directing

(c)

-NH₂ becomes -NH+ \({ SO }_{ 4 }^{ - }\) , which is m-directing

(d)

-NH₂ becomes -NH^- \({ NO }_{ 2 }^{ + }\), which is m-directing

26.

The total number of structural isomers possible for an amine with molecular formula C₄H₁₁N is

(a)

(b)

(c)

(d)

(e)

27.

Which of the following compounds will not undergo Friedel-Crafts reaction easily?

(a)

Nitrobenzene

(b)

Toluene

(c)

Cumene

(d)

Xylene

28.

In the nitration of benzene using a mixture of conc. H₂SO₄ and conc.HNO₃, the species which initiates the reaction is......................... .

(a)

NO₂

(b)

NO⁺

(c)

\({ NO }_{ 2 }^{ + }\)

(d)

\({ NO }_{ 2 }^{ - }\)

29.

The gas evolved when methylamine reacts with nitrous acid is.......................... .

(a)

NH₃

(b)

N₂

(c)

H₂

(d)

C₂H₆

30.

Amongst the given set of reactants, the most appropriate for preparing \({2}^{ \circ }\) amine is............................. .

(a)

\({ 2 }^{ \circ }\) R-Br + NH₃

(b)

\({ 2 }^{ \circ }\) R-Br+NaCN followed by H₂/Pt

(c)

\({ 1 }^{ \circ }\) R-NH₂+RCHO followed by H₂/Pt

(d)

\({ 1 }^{ \circ }\) R-Br (2 mol) + potassium phthalimide followed by H₃O⁺/heat

31.

The source of nitrogen in Gebriel synthesis of amines is............................ .

(a)

Sodium azide, NaN₃

(b)

Soudium nitrite, NaNO₂

(c)

Potassium cyanide, KCN

(d)

Potassium phthalimide, C₆H₄ (CO)₂ N^-K⁺

32.

Which of the following on oxidation with alkaline KMnO₄ followed by acidification with dil. HCI gives benxoic acid

(a)

tolune

(b)

ethylbenzene

(c)

isopropylbenzene

(d)

tert-butylbenzene

33.

A liquid was mixed with ethanol and a drop of concentrated H₂SO₄ was added. A compound with a fruity smell was formed. The liquid was

(a)

HCHO

(b)

CH₃COCH₃

(c)

CH₃COOH

(d)

CH₃OH

34.

Amoung the given compounds, the most susceptible to nucleophilic attack at the carbonyl group group is

(a)

CH₃COCI

(b)

CH₃COOCH₃

(c)

CH₃CONH₂

(d)

CH₃COOCOH₃

35.

The acid D obtained through the following sequence of reactions is: C₂H₅Br \(\xrightarrow{Alc.KOH}\) A \(\xrightarrow [ { CCI }_{ 4 } ]{ { Br }_{ 2 } } B\xrightarrow [ (excess) ]{ KCN } C\xrightarrow { { H }_{ 3 }{ O }^{ + } } D\)

(a)

succinic acid

(b)

malonic acid

(c)

maleic acid

(d)

oxalic acid

36.

Phenol \(\xrightarrow [ dust ]{ Zn } X\xrightarrow [ Anhyd.AI{ CI }_{ 3 } ]{ { CH }_{ 3 }CI } Y\xrightarrow [ KM{ nO }_{ 4 } ]{ Alk. } Z,\) The product Z is

(a)

benzaldehyde

(b)

benzoic acid

(c)

benzene

(d)

toluene

37.

Aldol condensation between which of the following two compounds followed by dehydration gives methyl vinyl ketone ?

(a)

Formaldehyde and acetone

(b)

Formaldehyde and acetaldehyde

(c)

Two molecules of acetaldehyde

(d)

Two molecules of acetone

38.

The smallest ketone and its next homologue are reacted with NH₂OH to form oxime

(a)

two different oximes are formed

(b)

three different oximes are formed

(c)

two oximes are optically active

(d)

all oximes are optically active

39.

Which of the following compounds gives dye test?

(a)

Aniline

(b)

Methylamine

(c)

Diphenylamine

(d)

Ethylamine

40.

The amine that reacts with NaNO₂+ HCI to give yellow oily liquid is

(a)

ethylamine

(b)

diethylamine

(c)

isopropylamine

(d)

secondary but ylamine

41.

When a primary amine reacts with chloroform and ethanolic KOH, then the product formed is

(a)

isocyanide

(b)

aldehyde

(c)

cyanide

(d)

alcohol

42.

Choose the incorrect statement

(a)

Primary amines show intermolecular hydrogen bonds.

(b)

tert-Butylamine is a primary amine.

(c)

Tertiary amines do not show intermolecular hydrogen bonds.

(d)

Isopropylamine is a secondary amine.

(e)

Amineshave lower boiling points as compared to those of alcohols of comparable molecular mass.

43.

Amine that cannot be prepared by Gabriel phthalimide synthesis is

(a)

aniline

(b)

benzylamine

(c)

methylamine

(d)

isobutylamine

(e)

tertiary-butylamine

44.

Ozonolysis of an organic compound gives formaldehyde as one of the peoducts. This confirms the presence of

(a)

a vinyl group

(b)

an isopropyl group

(c)

an acetylene triple bond

(d)

two ethylenic double bonds

45.

The increasing order of the rate of HCN addition to compounds, A ----------- D is
A. HCHO B. CH₃COCH₃ C. PhCOCH₃ D. PhCOPh

(a)

A < B < C < D

(b)

D < B < C < A

(c)

D < C < B < A

(d)

C < D < B < A

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Answers Key:

Multiple Choice Question

45 x 1 = 45

(a)
2, 2-dimethylbutanoic acid

(a)
Phenol

(d)
N-ethyl, N-methylethanamine

(b)
ethanamine

(b)
IV

(a)
\(\beta\)-Alanine

(a)
4-Methyl aniline

10.

(b)
Phenol and benzoyl chloride in the presence of pyridine

11.

12.

(d)
Both (a) and (b)

13.

(b)
p-amino azobenzene

14.

(b)
Gattermann reaction

15.

(a)
CH₃NH₂CH₃CI

16.

17.

(a)
Aniline

18.

(b)
Triethylamine

19.

(b)
acetaldehyde

20.

(d)
Na₂CO₃

21.

(d)
All of these

22.

Both p-chloroaniline and anilinium hydrochloride are \({ 1 }^{ \circ }\) amines and hence cannot be ditinguished by carbylamine reaction.

23.

(b)
is a source of electropholic nitrosonium ion

24.

(a)
(CH₃)₄N⁺I^-

25.

Protonation of the-NH₂ group gives NH₃ which is m-directing.

26.

(e)
8

27.

-NO₂ is a powerful dectivating group. It reduces the electron density in the benzene ring considerably. As a result, it does not undergo F.C.reactions.

28.

29.

(b)
N₂

30.

\(R-{ NH }_{ 2 }+RCHO\overset { Reductive }{ \underset { amination }{ \longrightarrow } } \quad \left[ R-N=CHR \right] \overset { { H }_{ 2 }/Pt }{ \longrightarrow } \underset { { 2 }^{ \circ }Amine }{ R-NH-{ CH }_{ 2 }R } \)

31.

C₆H₄(CO)₂N^-K⁺

32.