CBSE Questions for Class 12 Medical Chemistry Organic Compounds Containing Nitrogen Quiz 10 - MCQExams.com

Identify the most basic compound from the following.
  • Primary amines 
  • Secondary amines 
  •  Aromatic amines 
  •  Aliphatic amines
Compound $$(F)$$ is:
Identify the most basic amine among the above compounds :
246541_5a5d451b1658448ebf39783fa8bd5e68.png
  • i
  • ii
  • iii
  • iv
Compound $$(D)$$ is:
The following reaction is:
253878_ce022c735cb140a394a3fab0eb63a738.png
  • benzidine rearrangement
  • pinacol-pinacolone rearrangement
  • fries rearrangement
  • benzil-benzilic acid arrangement
Which statements are correct? 
  • Phenol and aniline give coupling reaction with diazonium salt.
  • Phenol couples with diazonium salt in mild basic conditions ($$\displaystyle pH = 8-10$$).
  • Aniline couples with diazonium salt in mild acidic condition ($$\displaystyle pH = 4-6$$).
  • Both phenol and aniline couple with diazonium salt in neutral condition ($$ pH = 7$$).
The decreasing order of the rate of bromination of the following compounds is:
$$I. Ph\overset { \oplus  }{ N{ Me }_{ 3 } } $$  
$$II. Ph{CH}_{3}\overset { \oplus  }{ N{ Me }_{ 3 } } $$  
$$III. PhMe$$  
$$IV. PhN{Me}_{2}$$
  • $$(I)>(II)>(III)>(IV)$$
  • $$(IV)>(III)>(II)>(I)$$
  • $$(III)>(IV)>(I)>(II)$$
  • $$(III)>(IV)>(II)>(I)$$
Gabriel synthesis is used for the preparation of: 
  • $$\displaystyle { 1 }^{ o }$$ amine
  • $$\displaystyle { 2 }^{ o }$$ amine
  • $$\displaystyle { 3 }^{ o }$$ amine
  • all of the above
Most basic compound in gaseous phase is :
  • $${NH}_{3}$$
  • $${CH}_{3}{CH}_{2}{NH}_{2}$$
  • $$({CH}_{3}{CH}_{2})_2NH$$
  • $${({CH}_{3}{CH}_{2})}_{3}N$$
Benzenediazonium chloride on reaction with aniline in a weakly basic medium gives :
  • diphenyl ether
  • p-aminoazobenzene
  • chlorobenzene
  • benzene
Which of the following compounds has the lowest boiling point?
  • 2-propanamine
  • ethylmethylamine
  • 1-propanamine
  • N,N-dimethylmethanamine
Which of the following statement(s) is/are correct?
  • Primary amines show intermolecular hydrogen bonding.
  • Secondary amines intermolecular hydrogen bonding.
  • Tertiary amines show intermolecular hydrogen bonding.
  • Amines have lower boiling points as compared to those of alcohols and carboxylic acid of comparable molar masses.
Which of the following statements is correct?
  • Aliphatic amines are stronger bases than ammonia.
  • Aromatic amines are stronger bases than ammonia.
  • The alkyl group in alkyl ammonium ion more stabilizes the ion relative to the amine.
  • The aryl group in aryl ammonium ion less stabilizes the ion relative to the amine.
$$C$$ and $$D$$ in the given sequence are :
263375_010deaf9dca04b69b477d26af7ad347a.png
  • Benzoic acid$$+$$ aniline
  • Phthalic acid $$+$$ ethylamine
  • Phthalic acid $$+$$ aniline
  • Benzoic acid $$+$$ ethylamine
Gabriel's phthalimide synthesis can be used to prepare:
  • ethanamine
  • n-methylmethanamine
  • benzeneamine
  • $$N, N-$$ dimethylmethanamine
  • p-toluidine
Which one of the following is used as a test for aliphatic primary amines ?
  • Tollen's test
  • Fehling's lest
  • Isocyanide test
  • Azo dye test
  • Phthalein fusion test.
The correct set of products obtained in the following reactions
$$RCN\xrightarrow [  ]{ reduction }  (A)$$, $$RCN \xrightarrow [ (ii){ H }_{ 2 }O ]{ (i){ CH }_{ 3 }MgBr }  (B)$$, $$RNC \xrightarrow [  ]{ hydrolysis }  (C)$$, $$R{NH}_{2}\xrightarrow [  ]{ H{NO}_{2} }  (D)$$
The answer is:
  • $$(A): {2}^{o}$$ Amine; $$(B)$$: Methyl ketone; $$(C):{1}^{o}$$ Amine; $$(D)$$ Alcohol
  • $$(A): {1}^{o}$$ Amine; $$(B)$$: Methyl ketone; $$(C):{1}^{o}$$ Amine; $$(D)$$ Alcohol
  • $$(A): {2}^{o}$$ Amine; $$(B)$$: Methyl ketone; $$(C):{2}^{o}$$ Amine; $$(D)$$ Acid
  • $$(A): {2}^{o}$$ Amine; $$(B)$$: Methyl ketone; $$(C):{2}^{o}$$ Amine; $$(D)$$ Aldehyde
Among the following the weakest base is:
  • $$C_6H_5CH_2NH_2$$
  • $$C_6H_5CH_2NHCH_3$$
  • $$O_2N-CH_2NH_2$$
  • $$CH_3NHCHO$$
$${CH}_{3}{CH}_{2}{NH}_{2}$$ is soluble in:
  • dilute $$HCl$$
  • $$Cu{SO}_{4}$$ solution
  • $$Ag{NO}_{3}$$
  • none of these
Arrange the following resonating structure according to their contribution towards resonance hybrid?
(a) $$CH_2=\overset {\oplus}{N}=\overset {\ominus}{N}$$ (b) $$\overset {\ominus}{C}H_2-N=\overset {\oplus}{N}:$$ (c) $$\overset {\oplus}{C}H_2-\underset {. .}{N}=\overset {\ominus}{N}$$ (d) $$\overset {\ominus}{C}H_2-\overset {\oplus}{N}\equiv \overset {. .}{N}$$
  • a > d > c > b
  • b > a > c > d
  • a > c > b > d
  • d > a > b > c
Which of the following orders regarding the basic strength of substituted aniline is correct?
  • p-methylaniline> p-chloroaniline > p-aminoacetophenone
  • p-methylaniline> p-aminoacetophenone> p-chloroaniline
  • p-aminoacetophenone> p-methylaniline> p-chloroaniline
  • p-aminoacetophenone> p-chloroaniline> p-methylaniline
Consider the given ions.
The reactivities of these ions in a azo-coupling reaction (under similar conditions) will be such that :
263654_fe544f0d93d74826964461b80bc73c26.png
  • $$(I)< (IV)< (II)< (III)$$
  • $$(I)< (III)< (IV)< (II)$$
  • $$(III)< (I)< (IV)< (II)$$
  • $$(III)< (I)< (II)<(IV)$$
The correct order of increasing basic nature of the following base is :
305229_045853466d6c4aaab850d03baa6f485f.png
  • 2 < 5 < 1 < 3 < 4
  • 5 < 2 < 1 < 3 < 4
  • 2 < 5 < 1 < 4 < 3
  • 5 < 2 < 1 < 4 < 3
Arrange in decreasing order of basic strength :
274594.bmp
  • $$I > II > III > IV$$
  • $$II > III > I > IV$$
  • $$IV > I > III > II$$
  • $$IV > I > II > III$$
Which of the following is/are correct statement/statements ?
  • Guanidine $$\begin{bmatrix}NH_2-\underset{\underset{NH}{||}}{C}-NH_2\end{bmatrix}$$ is more basic than pyridine because conjugate acid of guanidine has three equal contributing resonating structure.
  • Diethylamine is weaker base than triethylamine in aqueous medium.
  • Ortho-methyl aniline is weaker base than para-methyl aniline.
  • $$2,\,4,\,6$$-Trinitro-$$N,\,N$$-dimethyl aniline is stronger base than $$2,\,4,\,6$$-Trinitro aniline.
Arrange the following in the increasing order of the $$\displaystyle{pK}_b$$ values:
i) $$ C_2H_5NH_2 $$
ii)$$\,{ C }_{ 6 }{ H }_{ 5 }{ NHCH }_{ 3 }$$
iii)$$\,({ C }_{ 2}{ H }_{ 5 }{ ) }_{ 2 }NH$$
iv) $$ { C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • i < ii < iii < iv
  • iii < i < ii < iv
  • i < iii < ii < iv
  • iv < ii < i < iii
Arrange the following in the decreasing order of the $$\displaystyle{pK}_b$$ values: 
$$i)\,\displaystyle { C}_{ 2 }{ H }_{ 5 }{ NH }_{ 2 }$$ 
$$ii) \,{ C }_{ 6 }{ H }_{ 5 }{ NHCH }_{ 3 }$$ 
$$iii) \,({ C }_{ 2}{ H }_{ 5 }{ ) }_{ 2 }NH$$ 
$$iv) { C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$i > ii > iii > iv$$
  • $$iii > i > ii > iv$$
  • $$i > iii > ii > iv$$
  • $$ii > i > iii > iv$$
The given imine can be prepared from which of the following
1293842_d2a442ca62a844b0a9e84100ca999157.PNG
  • all of these
Select the correct statements regarding the final product (Y) :
332748.bmp
  • It can be identified with neutral $$\displaystyle FeCl_{3}$$ solution
  • On treatment with Zn-dust it yields a product having degree of unsaturation = 4
  • It undergoes coupling reaction with benzene diazonium chloride at low temperature (0 - $$\displaystyle 5^{\circ}C$$) in slightly basic medium
  • It liberates $$\displaystyle H_{2}$$ gas with Na
Iso-propyl amine is a:
  • primary amine
  • secondary amine
  • teritary amine
  • quaternary amine
On heating benzyl amine with chloroform and ethanolic $$KOH$$, product obtained is:
  • benzyl alcohol
  • benzaldehyde
  • benzonitrile
  • benzyl isocyanide
Identify the compounds from the following which form primary amines under suitable reduction conditions.
1. $$C_2H_5NC$$
$$C_2H_6$$
$$C_2H_5CONH_2$$
$$C_6H_5NO_2$$
  • $$1, 4$$
  • $$3, 4$$
  • $$1, 3, 4$$
  • $$2, 3, 4$$
Within the list shown below, the correct pair of structures of alanine in pH ranges 2-4 and 9-11 is: 
I. $$H_3N^+ - CH(CH_3)CO_2H$$
II. $$H_2N - CH(CH_3)CO_2^-$$
III. $$H_3N^+ - CH(CH_3)CO_2^-$$
IV. $$H_2N -CH(CH_3)CO_2H$$
  • I and II
  • I and III
  • II and III
  • III and IV
Predict respectively $$'X'$$ and $$'Y'$$ in the following reactions
$$Ar-N{ H }_{ 2 }\xrightarrow { \quad \quad X\quad \quad  } Ar-\overset { + }{ N } \equiv N.{ Cl }^- \xrightarrow { \quad \quad Y\quad \quad  } $$$$Ar-Cl$$
  • $$NaN{ O }_{ 3 }$$ & $${ Cl }_{ 2 }$$
  • $$NaN{ O }_{ 3 }-HCl$$ & $$HCl$$
  • $$NaN{ O }_{ 2 }-HCl$$ & $${ Cu }/{ HCl }$$
  • $$NaN{ O }_{ 2 }-HCl$$ & $$NaN{ H }_{ 2 }$$
The compound R is:
478187_923ce6b11bf74b299b67a29d8289fdbe.PNG
The compound T is:
478188_ab9c9c1599de40f596eb0523b7bcdd3e.PNG
  • Glycine
  • Alanine
  • Valine
  • Serine
$$CH_3CH_2CH_2CN+2H_2\xrightarrow {Pd}$$

Which of the following compound is formed in the above reaction?
  • $$CH_3CH_2CH_2CH_2NH_2$$
  • $$CH_3CH_2CH_2NH_2$$
  • $$CH_3CH_2CH_2CH_2CH_2NH_2$$
  • None of the above
In the reduction of nitriles to prepare primary amine:
  • $$LiAlH_4$$ is used.
  • $$NaBH_4$$ is used.
  • $$Sn/HCl$$ is used.
  • none of these.
Predict the product.
$$CH_3-CH_2-CN + H_2/Ni \rightarrow$$?
  • $$CH_3-CH_2-CH_2-NH_2$$
  • $$CH_3-CH_2-NH_2$$
  • both a and b
  • none of these
The reduction of nitrile gives ascent of amine series indicating:
  • preparation of amines containing two carbon atom more than starting amine
  • preparation of amines containing one carbon atom more than starting amine
  • preparation of amines containing three carbon atom more than starting amine
  • preparation of amines containing four carbon atom more than starting amine
Which of the following is the correct order of the solubility in water?
  • propane $$<$$ ethylamine $$<$$ ethyl alcohol
  • propane $$<$$ ethyl alcohol $$<$$ ethylamine
  • ethyl alcohol $$<$$ propane $$<$$ ethylamine
  • ethyl alcohol $$<$$ ethylamine $$<$$ propane
Which of the following represents the correct order of basic strength?
  • N,N-Dimethylaniline $$>$$ N-methylaniline $$>$$ aniline
  • N,N-Dimethylaniline $$>$$ aniline $$>$$ N-methylaniline
  • aniline $$>$$ N-methylaniline $$>$$ N,N-Dimethyl aniline
  • N-methylaniline $$>$$ N,N-Dimethylaniline $$>$$ aniline
In the given set of reactions, the IUPAC name of product $$Y$$ is:

$$2-\text{Bromopropane} \xrightarrow [ alc.\ KOH ]{ AgCN }\ \ X\xrightarrow [  ]{ LiAl{ H }_{ 4 } }\ \ Y\quad $$
  • N-methylpropanamine
  • N-isopropylmethanamine
  • butan-2-amine
  • N-methylpropan-2-amine
Point out the correct decreasing order of $$pK_b$$ values of following amines:
$$C_2H_5NH_2 $$ , $$C_6H_5NHCH_3,$$ $$(C_2H_5)_2NH$$ and $$C_6H_5NH_2$$
  • $$(C_2H_5)_2NH > C_2H_5NH_2 > C_6H_5NHCH_3 > C_6H_5NH_2$$
  • $$(C_2H_5)_2NH > C_6H_5NHCH_3 > C_6H_5NH_2 > C_2H_5NH_2$$
  • $$C_6H_5NH_2 > C_6H_5NHCH_3 > C_2H_5NH_2 > (C_2H_5)_2NH$$
  • $$C_2H_5NH_2 > (C_2H_5)_2NH > C_6H_5NHCH_3 > C_6H_5NH_2 $$
Which one of the following can be prepared by Gabriel phthalimide synthesis?
  • Aniline
  • $$o$$-toluidine
  • Benzylamine
  • N-methylethanamine
  • 4-bromoaniline
The correct order of basicity of the following compounds is:
573219_71d5356b40ab4252901823adc2131a5c.png
  • $$1 < 2 < 3 < 4$$
  • $$1 < 2 < 4 < 3$$
  • $$2 < 1 < 3 < 4$$
  • $$4 < 3 < 2 < 1$$
Acetonitrile on reduction gives:
  • ethanamine 
  • propanamine
  • methanamine
  • None of the above
Among the following substituted pyridines, the most basic compound is:
The correct basicity order of the following compound is :
584781_64eaa3d9b77d4670adaf2a77c7d182ce.png
  • $$I > III > II > IV$$
  • $$III > I > II > IV$$
  • $$II > I > III > IV$$
  • $$I > II > III > IV$$
Benzylamine is a stronger base than aniline because:
  • the lone pair of electrons on the nitrogen atom in benzylamine is delocalised
  • the lone pair of electrons on the nitrogen atom in aniline is delocalised
  • the lone pair of electrons on the nitrogen atom in aniline is not involved in resonance
  • benzylamine has a higher molecular mass than aniline
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