361 + Interview Questions in AMINES IN GENERAL AWARENESS Page 7 InterviewSolution

301.	The product C isA. `CH_(3)-CH_(2)CH_(2)-NO_(2)`B. `CH_(3)underset(ONO)underset(\|)(CH)-CH_(3)`C. `CH_(3)underset(NO_(2))underset(\|)(CH)-CH_(3)`D. `CH_(3)CH_(2)CH_(2)ONO`
Answer» Correct Answer - A

Discussion

302.	When benzenediazonium chloride is heated with fluoro boric acid, fluorobenzene is formed. This reaction is calledA. Balz Schiemann reationB. Gattermann reactionC. Sandmeyer reactionD. Hoffmann bromamide reaction
Answer» Correct Answer - A

Discussion

303.	By which process aniline can be purified .........
Answer» Steam distillation

Discussion

304.	Secondary amines can be prepared by ......
Answer» Reduction of nitro compounds

Discussion

305.	Which of the following reactions give the poor yield of amine products?A. `CH_(3)-overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)C-overset(O)overset(\|\|)C-NH_(2) overset(Br_(2)+NaOH)underset(Delta)to`B. C. `CH_(3)-overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)C-Br + NH_(3) to `D.
Answer» Correct Answer - B::C

Discussion

306.	Which of the following compounds react with `HNO_(2)`?A. B. C. D.
Answer» Correct Answer - B::C::D

Discussion

307.	Which of the following can give `1^(@)` amine?A. `Ph-overset(CH_(3))overset(\|)(CH)-OH overset(NaCN,H^(o+))rarr`B. `Ph-CH=CH-overset(O)overset(\|\|)(C)-NH_(2) overset(NaOCI)underset(CH_(3)OH)rarr`C. `Ph-C-=C-overset(O)overset(\|\|)(C)-NH_(2) overset(NaOBr)rarr`D. `Ph-overset(O)overset(\|\|)(C)-CI overset(NaN_(3))underset(Delta)rarr overset(LiAIH_(4))rarr`
Answer» Correct Answer - B::C::D

Discussion

308.	`C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as intermediate, then various possible products are:A. `C_(6)H_(5)CN_(2)NH_(2)`B. `C_(6)H_(5)N=CH_(2)`C. `C_(6)H_(5)CN=NH`D.
Answer» Correct Answer - B::C

Discussion

309.	Rank the following compounds in order of increasing basic strength. (weakest`to`strongest) A. `4lt2lt1lt3`B. `4lt3lt1lt2`C. `4lt1lt3lt2`D. `2lt1lt3lt4`
Answer» Correct Answer - B (4) `Ph-overset(O)overset(\|\|)C-NH_(2)` is weak base because of resonance. One to -M of `NO_(2)` and ortho effect it is weak base. 3) Strong base lone pair is not involved in resonance.

Discussion

310.	Which of the following compounds do not give Friedel Crafts reaction?A. B. C. D.
Answer» Correct Answer - A::B

Discussion

311.	Which of the following compounds can be converted into amines in the presence of Na and alcohol?(a) Alkyl nitriles(b) Aldoxime (c) Ketoxime (d) All of these
Answer» Option : (d) All of these

Discussion

312.	Isopropylamine is obtained by the reduction of :(a) acetoxime (b) acetaldoxime (c) formaldoxime (d) aldoxime
Answer» Option : (a) acetoxime

Discussion

313.	Which of the following compounds does not exist as a zwitter ion ?A. B. `H_(2)NCH_(2)COOH`D. `CH_(3)CH(NH_(2))COOH`
Answer» Correct Answer - C An aromatic `-NH_(2)` group `(K_(a)=10^(-5))` and hence cannot appreciably neutralize the strongly acidic `-SO_(3)H` group as in sulphanilic acid In other words aliphatic `NH_(2)` is sufficiently basic to accept an `H^(+)` from `COOH` The `COOH` is not strong enough to donate `H^(+)` to the weakly basic `ArNH_(2)` but `SO_(3)H` is a sufficiently strong acid to do so .

Discussion

314.	Which of the following exist as Zwitter ion?(a) Salicylic acid (b) Suphanilic acid (c) p-Aminophenol (d) p-Amino acetophenone
Answer» Option : (b) Suphanilic acid

Discussion

315.	The reagents that can be used to convert benzenediazonium chloride to benzene are __________.(i) SnCl2/HCl(ii) CH3CH2OH(iii) H3PO2(iv) LiAlH4
Answer» (ii), (iii) (ii) CH₃CH₂OH (iii) H₃PO₂

315.

The reagents that can be used to convert benzenediazonium chloride to benzene are __________.(i) SnCl2/HCl(ii) CH3CH2OH(iii) H3PO2(iv) LiAlH4

Answer»

(ii), (iii)

(ii) CH₃CH₂OH

(iii) H₃PO₂

Discussion

316.	Benzene sulphonyl chloride and aqueous NaOH can be used to distinguish three classes of amines such as primary, secondary and tertiary. a) Name the above test.b) How will you distinguish the above amines using this test?c) Give the reactions and justifications,
Answer» a) Hinsberg test. C₆H₅SO₂Cl b) 1° Amine + Hinsberg reagent → a compound soluble in alkali 2° Amine + Hinsberg reagent → A compound which is insoluble in alkali 3° Amine +Hinsberg reagent → no reaction. c) The hydrogen attached to nitrogen in sulphonamide is strongly acidic due to the presence of strong electron withdrawing sulphonyl group. Hence, it is soluble in alkali. Secondary amine react with benzene salphonyl chloride to form N, N-dialkylbenzene- sulphon-amide, which is insoluble in alkali. This is be?cause it does not contain any hydrogen attached to nitrogen atom and is not acidic. Tertiary amines do not react with benzene salphonyl chloride, because they do not possess any replacable hydrogen.

316.

Benzene sulphonyl chloride and aqueous NaOH can be used to distinguish three classes of amines such as primary, secondary and tertiary. a) Name the above test.b) How will you distinguish the above amines using this test?c) Give the reactions and justifications,

Answer»

a) Hinsberg test. C₆H₅SO₂Cl

b) 1° Amine + Hinsberg reagent → a compound soluble in alkali

2° Amine + Hinsberg reagent → A compound which is insoluble in alkali

3° Amine +Hinsberg reagent → no reaction.

c) The hydrogen attached to nitrogen in sulphonamide is strongly acidic due to the presence of strong electron withdrawing sulphonyl group. Hence, it is soluble in alkali.

Secondary amine react with benzene salphonyl chloride to form N, N-dialkylbenzene- sulphon-amide, which is insoluble in alkali. This is be?cause it does not contain any hydrogen attached to nitrogen atom and is not acidic.

Tertiary amines do not react with benzene salphonyl chloride, because they do not possess any replacable hydrogen.

Discussion

317.	Reduction of benzene diazonium chloride with Zn/HCl gives :(a) phenyl hydrazine (b) hydrazine hydrate (c) aniline (d) ozo benzene
Answer» Option : (c) aniline

Discussion

318.	Identify ‘Z’ in the sequence:(a) Nitrobenzene(b) Benzene(c) Fluorobenzene(d) Phenol
Answer» (a) Nitrobenzene

Discussion

319.	When benzene diazonium salt solution is treated with KI ....... is formed.
Answer» lodo benzene (C₆H₅I)

Discussion

320.	When benzene diazonium chloride is treated with cuprous chloride and HCl the product formed isA. ChlorobenzeneB. BenzeneC. PhenolD. Chloroazobenzene
Answer» Correct Answer - A

Discussion

321.	Hoffmann Bromamide Degradation reaction is shown by __________.(i) ArNH2(ii) ArCONH2(iii) ArNO2(iv) ArCH2NH2
Answer» (ii) ArCONH₂

Discussion

322.	The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ____.(i) excess H2/Pt(ii) NaOH/Br2(iii) NaBH4/methanol(iv) LiAlH4/ether
Answer» (ii) NaOH/Br₂

Discussion

323.	Match column-I (Compound) with coloumn-II (Property)
Answer» Correct Answer - A::B::C::D

Discussion

324.	Match the coloumn-I with column-II
Answer» Correct Answer - A::B::C::D

Discussion

325.	The gas leaked from a stronge tank of the Union Carbide plant in Bhopal gas tragedy wasA. MethylamineB. AmmoniaC. PhosgeneD. Mehtylisocyanate
Answer» Correct Answer - D Gas leaked was methy1 isocylamine `CH_(3)-N=C=O` .

Discussion

326.	Write the IUPAC name of benzylamine.
Answer» The IUPAC name is Phenylmethanamine.

Discussion

327.	The correct increasing order of basic strength for the following compounds is _________.(i) II < III < I(ii) III < I < II(iii) III < II < I(iv) II < I < III
Answer» (iv) II < I < III

Discussion

328.	Arrange the following compounds in an increasing order of basic strength :Aniline, pnitroaniline, p-toluidine.
Answer» p-nitroaniline < aniline < p-toluidine.

Discussion

329.	Arrange the following(i) NH3, C2H5NH2 , (C2H5)2NH , (C2H5)3N (Decreasing order of basicity in gaseous phase)(ii) CH3CH2CH3 , CH3CH2NH2 , CH3CH2OH ( Increasing order of Boiling Point)
Answer» (i) (C₂H₅)₃N > (C₂H₅)₂NH > C₂H₅NH₂ > NH₃ (ii) CH₃CH₂CH₃ < C₂H₅NH₂ < C₂H₅O

329.

Arrange the following(i) NH3, C2H5NH2 , (C2H5)2NH , (C2H5)3N (Decreasing order of basicity in gaseous phase)(ii) CH3CH2CH3 , CH3CH2NH2 , CH3CH2OH ( Increasing order of Boiling Point)

Answer»

(i) (C₂H₅)₃N > (C₂H₅)₂NH > C₂H₅NH₂ > NH₃

(ii) CH₃CH₂CH₃ < C₂H₅NH₂ < C₂H₅O

Discussion

330.	Write down the IUPAC name of
Answer» N, N-Dimethylbenzenamine

Discussion

331.	The correct IUPAC name for `CH_(2)=CHCH_(2)NHCH_(3)` isA. allyl methylamineB. 2-amiono-4-pentaneC. 4-aminopent-1-eneD. N-methylprop-2-ene-1-amine
Answer» Correct Answer - D IUPAC name `overset(3)(CH_(2))=overset(2)(CH)overset(1)(CH_(2) NHCH_(3) ` is N-methylprop-2-ene-1amine Hence, option (d) is correct

Discussion

332.	The IUPAC name of ethyl dimethyl amine is ……………..(a) 2-amino propane (b) N,N-dimethyl ethanolamine (c) ethyl methanamine (d) propanamine
Answer» Option : (b) N,N-dimethyl ethanolamine

Discussion

333.	IUPAC name of diethylmethyl amine is ………………(a) methyl amino propane (b) N-Ethyl-N-methylhexanamine (c) methyl diethanamine (d) amino pentane
Answer» Option : (b) N-Ethyl-N-methylhexanamine

Discussion

334.	Explain the following observation: Electrophilic substitution in case of aromatic amines takes place more readily than benzene.
Answer» It is because `-NH_(2)` group is electron releasing which increases electron density on benzene ring and there is `-ve` charge at o- and p- position in resonating structure of aniline. Thus, it activates the benzene ring for electrophilic substitution.

Discussion

335.	`1^(@),2^(@)` and `3^(@)` nitroalkane can be identified by action of:A. `HNO_(3)+NaOH` (aq).B. `CHCI_(3)+NaOH` (aq)C. `HNO_(2)+NaOH` (aq)D. `CHCI_(3)+KOH` (aq.)
Answer» Correct Answer - C

Discussion

336.	The final product B obtained in the reaction is: A. B. `(H_(2)C = CH)_(2)`C. `H_(3)C-CH=CH-CH_(2)`D.
Answer» Correct Answer - A

Discussion

337.	Which of the following reactions belong to electrophilic aromatic substitution?(i) Bromination of acetanilide(ii) Coupling reaction of aryldiazonium salts(iii) Diazotisation of aniline(iv) Acylation of aniline
Answer» (i), (ii) (i) Bromination of acetanilide (ii) Coupling reaction of aryldiazonium salts

337.

Which of the following reactions belong to electrophilic aromatic substitution?(i) Bromination of acetanilide(ii) Coupling reaction of aryldiazonium salts(iii) Diazotisation of aniline(iv) Acylation of aniline

Answer»

(i), (ii)

(i) Bromination of acetanilide
(ii) Coupling reaction of aryldiazonium salts

Discussion

338.	For such kind of diazo- coupling reaction the suitable substituents P and S are respectively:A. `-NH_(2)` and `-OCH_(3)`B. `-NO_(2)` and `-overset(O)overset(\|\|)(C)-H`C. `-NH_(2)` and `-NHCH_(3)`D.
Answer» Correct Answer - D

Discussion

339.	Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?(i) Acetyl chloride/pyridine followed by reaction with conc. H2SO4 + conc. HNO3.(ii) Acetic anyhdride/pyridine followed by conc. H2SO4 + conc. HNO3.(iii) Dil. HCl followed by reaction with conc. H2SO4 + conc. HNO3.(iv) Reaction with conc. HNO3 + conc.H2SO4.
Answer» (i), (ii) (i) Acetyl chloride/pyridine followed by reaction with conc. H₂SO₄+ conc. HNO₃. (ii) Acetic anyhdride/pyridine followed by conc. H₂SO₄ + conc. HNO₃.

339.

Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?(i) Acetyl chloride/pyridine followed by reaction with conc. H2SO4 + conc. HNO3.(ii) Acetic anyhdride/pyridine followed by conc. H2SO4 + conc. HNO3.(iii) Dil. HCl followed by reaction with conc. H2SO4 + conc. HNO3.(iv) Reaction with conc. HNO3 + conc.H2SO4.

Answer»

(i), (ii)

(i) Acetyl chloride/pyridine followed by reaction with conc. H₂SO₄+ conc. HNO₃.

(ii) Acetic anyhdride/pyridine followed by conc. H₂SO₄ + conc. HNO₃.

Discussion

340.	What is the likely product from the following reaction? A. B. C. D.
Answer» Correct Answer - B

Discussion

341.	Consider the following diazonium ion: The order of reactivity towards diazo coupling with phenol in presence of dil. NaOH:A. `P gt Q gt R gt S`B. `Q gt S gt R gt P`C. `P gt R gt S gt Q`D. `S gt R gt Q gt P`
Answer» Correct Answer - B

Discussion

342.	Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, `3^(@)` optically inative alcohol. Find out structures of amines:A. B. C. D.
Answer» Correct Answer - A::C

Discussion

343.	Decreasing order of basicity of the three isomers of nitro aniline is:A. p-nitroaniline `gt o`-nitroaniline `gtm`-nitroanilineB. p-nitroaniline `gt m`-nitroaniline `gt o`-nitroalinineC. m-nitroaniline `gt p-`nitroaniline `gto-` nitroanilineD. m-nitroaniline `gt o-` nitroaniline `gt p-` nitroaniline
Answer» Correct Answer - C

Discussion

344.	Which is the best leaving group ?A. `-overset(o+)(N)-= N`B. `OH^(-)`C. `NH_(2)^(-)`D. `CH_(3)COO^(-)`
Answer» Correct Answer - A

Discussion

345.	What is the likely product from the following reaction? A. B. C. D.
Answer» Correct Answer - B

Discussion

346.	When an primary aromatic amine is treated with `NaNO_(2)+HCI` at `0^(@)-5^(@)C`, a diazonium salt is formed and the reaction is called diazo reaction. In this reaction mineral acid must be added to prevent the coulping reaction of diazonium salt with excess of aryl amine. diazonium salt is highly in the synthesis of number of coloured dyes. In the given reaction. The final product isA. B. C. D.
Answer» Correct Answer - A

Discussion

347.	Strongest base is:A. B. C. D.
Answer» Correct Answer - A

Discussion

348.	Which compound is the likely from following reaction? A. B. C. D.
Answer» Correct Answer - B

Discussion

349.	Treatment of primary amines with nitrous acid gives diazonium ions. Aliphatic diazonium ions decompose under the diazotization conditions to give complex mixture of products. Aryldiazonium ions are stable and is a valubale intermediate. They react with activated aromatic compounds to give coupling product. At what pH phenol reacts with benzene diazonium chloride to give coupling product?A. B. C. D.
Answer» Correct Answer - A

Discussion

350.	Treatment of primary amines with nitrous acid gives diazonium ions. Aliphatic diazonium ions decompose under the diazotization conditions to give complex mixture of products. Aryldiazonium ions are stable and is a valubale intermediate. They react with activated aromatic compounds to give coupling product. At what pH phenol reacts with benzene diazonium chloride to give coupling product?A. pH=2B. pH=7C. pH=9D. pH=14
Answer» Correct Answer - C

Discussion

Explore topic-wise InterviewSolutions in .

The product C isA. `CH_(3)-CH_(2)CH_(2)-NO_(2)`B. `CH_(3)underset(ONO)underset(|)(CH)-CH_(3)`C. `CH_(3)underset(NO_(2))underset(|)(CH)-CH_(3)`D. `CH_(3)CH_(2)CH_(2)ONO`

When benzenediazonium chloride is heated with fluoro boric acid, fluorobenzene is formed. This reaction is calledA. Balz Schiemann reationB. Gattermann reactionC. Sandmeyer reactionD. Hoffmann bromamide reaction

By which process aniline can be purified .........

Secondary amines can be prepared by ......

Which of the following reactions give the poor yield of amine products?A. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-overset(O)overset(||)C-NH_(2) overset(Br_(2)+NaOH)underset(Delta)to`B. C. `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-Br + NH_(3) to `D.

Which of the following compounds react with `HNO_(2)`?A. B. C. D.

`C_(6)H_(5)-CH_(2)-I overset(NaN_(3))underset(Delta)rarr` Products Reaction is assumed to involve nitrene as intermediate, then various possible products are:A. `C_(6)H_(5)CN_(2)NH_(2)`B. `C_(6)H_(5)N=CH_(2)`C. `C_(6)H_(5)CN=NH`D.

Rank the following compounds in order of increasing basic strength. (weakest`to`strongest) A. `4lt2lt1lt3`B. `4lt3lt1lt2`C. `4lt1lt3lt2`D. `2lt1lt3lt4`

Which of the following compounds do not give Friedel Crafts reaction?A. B. C. D.

Which of the following compounds can be converted into amines in the presence of Na and alcohol?(a) Alkyl nitriles(b) Aldoxime (c) Ketoxime (d) All of these

Isopropylamine is obtained by the reduction of :(a) acetoxime (b) acetaldoxime (c) formaldoxime (d) aldoxime

Which of the following compounds does not exist as a zwitter ion ?A. B. `H_(2)NCH_(2)COOH`D. `CH_(3)CH(NH_(2))COOH`

Which of the following exist as Zwitter ion?(a) Salicylic acid (b) Suphanilic acid (c) p-Aminophenol (d) p-Amino acetophenone

The reagents that can be used to convert benzenediazonium chloride to benzene are __________.(i) SnCl2/HCl(ii) CH3CH2OH(iii) H3PO2(iv) LiAlH4

Benzene sulphonyl chloride and aqueous NaOH can be used to distinguish three classes of amines such as primary, secondary and tertiary. a) Name the above test.b) How will you distinguish the above amines using this test?c) Give the reactions and justifications,

Reduction of benzene diazonium chloride with Zn/HCl gives :(a) phenyl hydrazine (b) hydrazine hydrate (c) aniline (d) ozo benzene

Identify ‘Z’ in the sequence:(a) Nitrobenzene(b) Benzene(c) Fluorobenzene(d) Phenol

When benzene diazonium salt solution is treated with KI ....... is formed.

When benzene diazonium chloride is treated with cuprous chloride and HCl the product formed isA. ChlorobenzeneB. BenzeneC. PhenolD. Chloroazobenzene

Hoffmann Bromamide Degradation reaction is shown by __________.(i) ArNH2(ii) ArCONH2(iii) ArNO2(iv) ArCH2NH2

The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ____.(i) excess H2/Pt(ii) NaOH/Br2(iii) NaBH4/methanol(iv) LiAlH4/ether

Match column-I (Compound) with coloumn-II (Property)

Match the coloumn-I with column-II

The gas leaked from a stronge tank of the Union Carbide plant in Bhopal gas tragedy wasA. MethylamineB. AmmoniaC. PhosgeneD. Mehtylisocyanate

Write the IUPAC name of benzylamine.

The correct increasing order of basic strength for the following compounds is _________.(i) II &lt; III &lt; I(ii) III &lt; I &lt; II(iii) III &lt; II &lt; I(iv) II &lt; I &lt; III

Arrange the following compounds in an increasing order of basic strength :Aniline, pnitroaniline, p-toluidine.

Arrange the following(i) NH3, C2H5NH2 , (C2H5)2NH , (C2H5)3N (Decreasing order of basicity in gaseous phase)(ii) CH3CH2CH3 , CH3CH2NH2 , CH3CH2OH ( Increasing order of Boiling Point)

Write down the IUPAC name of

The correct IUPAC name for `CH_(2)=CHCH_(2)NHCH_(3)` isA. allyl methylamineB. 2-amiono-4-pentaneC. 4-aminopent-1-eneD. N-methylprop-2-ene-1-amine

The IUPAC name of ethyl dimethyl amine is ……………..(a) 2-amino propane (b) N,N-dimethyl ethanolamine (c) ethyl methanamine (d) propanamine

IUPAC name of diethylmethyl amine is ………………(a) methyl amino propane (b) N-Ethyl-N-methylhexanamine (c) methyl diethanamine (d) amino pentane

Explain the following observation: Electrophilic substitution in case of aromatic amines takes place more readily than benzene.

`1^(@),2^(@)` and `3^(@)` nitroalkane can be identified by action of:A. `HNO_(3)+NaOH` (aq).B. `CHCI_(3)+NaOH` (aq)C. `HNO_(2)+NaOH` (aq)D. `CHCI_(3)+KOH` (aq.)

The final product B obtained in the reaction is: A. B. `(H_(2)C = CH)_(2)`C. `H_(3)C-CH=CH-CH_(2)`D.

Which of the following reactions belong to electrophilic aromatic substitution?(i) Bromination of acetanilide(ii) Coupling reaction of aryldiazonium salts(iii) Diazotisation of aniline(iv) Acylation of aniline

For such kind of diazo- coupling reaction the suitable substituents P and S are respectively:A. `-NH_(2)` and `-OCH_(3)`B. `-NO_(2)` and `-overset(O)overset(||)(C)-H`C. `-NH_(2)` and `-NHCH_(3)`D.

What is the likely product from the following reaction? A. B. C. D.

Consider the following diazonium ion: The order of reactivity towards diazo coupling with phenol in presence of dil. NaOH:A. `P gt Q gt R gt S`B. `Q gt S gt R gt P`C. `P gt R gt S gt Q`D. `S gt R gt Q gt P`

Optically active amine having molecular formula `C_(5)H_(13)N` on reaction with `NaNO_(2)+HCI` produces, `3^(@)` optically inative alcohol. Find out structures of amines:A. B. C. D.

Decreasing order of basicity of the three isomers of nitro aniline is:A. p-nitroaniline `gt o`-nitroaniline `gtm`-nitroanilineB. p-nitroaniline `gt m`-nitroaniline `gt o`-nitroalinineC. m-nitroaniline `gt p-`nitroaniline `gto-` nitroanilineD. m-nitroaniline `gt o-` nitroaniline `gt p-` nitroaniline

Which is the best leaving group ?A. `-overset(o+)(N)-= N`B. `OH^(-)`C. `NH_(2)^(-)`D. `CH_(3)COO^(-)`

What is the likely product from the following reaction? A. B. C. D.

Strongest base is:A. B. C. D.

Which compound is the likely from following reaction? A. B. C. D.

The correct increasing order of basic strength for the following compounds is _________.(i) II < III < I(ii) III < I < II(iii) III < II < I(iv) II < I < III