361 + Interview Questions in AMINES IN GENERAL AWARENESS Page 1 InterviewSolution

1.	Which of the following is most basic?A. B. C. D.
Answer» Correct Answer - A

Discussion

2.	Which of the follwing compounds is most basic ? .A. B. C. D.
Answer» Correct Answer - B Because in other compounds the lone pair of electrons on `N` atom is delocalized through resonance with benzene ring The correct order of basic strength is `(2) gt (3) gt (4) lt (1)` .

Discussion

3.	`C_(3)H_(9)N` cannot representA. `1^(@)`B. `2^(@)` amineC. `3^(@)` amineD. quaternary salt
Answer» Correct Answer - D Quaternary salts are characterized by the general formula `R_(4)overset(+)NZbar` e.g `(CH_(3))_(4)overset(+)NCIbar` `C_(3)H_(9)N` could be `CH_(3)CH_(2)NH_(2)(1^(@)amine),CH_(3)CH_(2)NHCH_(3)` `(2^(@) amine)` and `(CH_(3))_(3)N (a3^(@)amine)` .

Discussion

4.	Which of the follwing are used as urfactants ? .A. Quaternary ammonium saltsB. Diazonium saltsC. Aminium saltsD. Ammonium salts
Answer» Correct Answer - A Cationic detergents arwe quaternary ammonium salts of amine with acetates a long hydrocarbon chain and a positive charge on `N` atom Hence these are called cationic detergents Cetyltrimetylammonium bromide is a popular cationic detergent and is used in hair conditioners. `underset(("cetyltrimethylammonium bromide"))([CH_(3)(CH_(2))_(15)-overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)(N)-CH_(3)])^(+)Br^(-)` Diazonium salts are intermediates in the preparation of a veriety of aromatic compounds including dyes.

Discussion

5.	Ritter reaction is a good method for preparing primary amines containing a .A. primary alky1 groupB. secondary alky1 groupC. tertiary alky1 groupD. quaternary alky1 group
Answer» Correct Answer - C The Ritter reaction occurs between alcohol (or alkene) and alky1 cyanide (or hydrocyanic acid) in the presence of sulphuric acid to produce an amide . `R_(3)COHunderset (NaCN)overset(H_(2)SO_(4))rarrCH-overset(O)overset(\|\|)C-H overset(OHbar)rarrR_(3)CNH_(2)` .

Discussion

6.	The end prouct `(B)` formed in the reaction `RNCoverset(HgO)rarrAunderset(Delta)overset(KOH)rarrB` is .A. `RNH_(2)`B. `RCH_(2)NH_(2)`C. `RNHCH_(3)`D. `RNHR`
Answer» Correct Answer - A Alky1 isocyanides are readily oxidized by mercuric oxide to alky1 isocyanates which yield primary amines on boilling with alkali `RNC + HgO rarr RNCO + Hg` `RNCO + 2KOH rarr RNH_(2)+ K_(2)CO_(3)` .

Discussion

7.	The end product `(B)` formed in the reaction `CH_(3)CH_(2)Broverset(AgCN)rarrAunderset(2H_(3)O^(+))overset("1.NaOH Prolonged heat")rarr` is .A. `CH_(3)CH_(2)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D. `(CH_(3)CH_(2))_(3)N`
Answer» Correct Answer - C Step -1 Alkyl isocyanides (also known as isonitriles or carbylamines) are obtained when we heat an alkyl halide with silver cyanide in aqueous ethanolic solution `A` small amount of cyanide is also formed `CH_(3)CH_(2)Br underset(-AgBr)overset(AgCN)rarrCH_(3)underset((A))(CH_(2)NC` Step -2 Alkyl isocyanides are hydrolysed to an amine and formic acid by dilute acids but are not hydrolysed by alkalis But on prolonged heating with an alkali hydrolysis becomes possible. `CH_(3)CH_(2)NC+2H_(2)Ooverset("acid")rarrCH_(3)underset((B))(CH_(2))NH_(2)+HCO_(2)H` .

Discussion

8.	Consider the following sequence of reactions: `overset(C CI_(4))underset(Delta)rarr A overset(1.CH_(2)=CH-CH_(2)Br)underset(2.H_(3)O^(o+),Delta)rarrB` The end product (B) is:A. B. C. D.
Answer» Correct Answer - A

Discussion

9.	`CH_(3)CH_(2)Br overset(AgCN)rarr A overset(NaOH, Delta)underset(overset(o+)(H_(3)O))rarrB,(B)` is:A. `CH_(3)CH_(2)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D.
Answer» Correct Answer - C

Discussion

10.	Consider the following sequence of reactions `C_(6)H_(5)CH_(2)Ioverset(KCH)rarrA overset(H_(2)//Ni)rarrB` the final product `(B)` is .A. `C_(6)H_(5)CH_(2)CH_(2)NH_(2)`B. `C_(6)H_(5)CH_(2)NH_(2)`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NHCH_(3)`
Answer» Correct Answer - A On treatment with potassium or sodium cyanide alky1 halides undergo nucleophilic substitution of form alky1 nitriles which on reduction with `LiAIH_(4)(LAH)` or catalytic hydrogenation form primary amines which have one carbon more than the alky1 halide used `C_(6)H_(5)CH_(2)Br overset(KCN)rarrC_(6)H_(5)CH_(2)CHoverset(H_(2)//Ni)rarrC_(6)H_(5)CH_(2)CH_(2)NH_(2)` This reaction is used for ascent of series .

Discussion

11.	The reaction`CH_(3)I+NH_(3)(excess)underset(2.OHbar)overset(1.heat)rarrCH_(3)NH_(2)+HI` is an example of aA. unimolecular nucleophilic substitution reactionB. bimolecular nucleophilic substitution reaction .C. unimolecular eletrphilic substitution reactionD. bimolecular electrophilic substitution reaction .
Answer» Correct Answer - B When an alky1 halide is heated with excess of ammonia it undergoes bimolecular `(S_(N)2)` nucleophilic substitution and the ammonium salt formed initially on basification gives a primary amine `CH_(3)INH_(3)(excess)overset(heat)rarrCH_(3)overset(+)(NH_(3))Ioverset(OHbar)rarrCH_(3)NH_(2)` .

Discussion

12.	Coupling of diazonium salts of following takes place in the order
Answer» Correct Answer - D Electron withdrawing groups `(likeoverset(+)NH_(3))` accelerate coupling while electron releasing grops (like `NH_(2),OH` and `Obar`) retard coupling Since electron releasing power is `-barO gt NH_(2) gt OH` the order of reactivity is (IV)gt(II)gt(III)gt(I) .

Discussion

13.	Which of the following compounds is chiral? .A. `CH_(3)CH_(2)overset(..)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)overset(CH_(3))overset(\|)underset(..)(N)CH_(2)CH_(2)CH_(3)`C. `CH_(3)CH_(2)CH_(2)underset(CH_(2)CH_(3))underset(\|)overset(CH_(2)C_(6)H_(5))overset(\|)(N^(+))Brbar`D. all of these
Answer» Correct Answer - D Each of these is chiral due to the presence of chiral nitrogen atom However only the third compound (quaternary ammonium salt) is resolvable due to absence of nitrogen inversion .

Discussion

14.	A secondary amine is a compound which possesses .A. A compound with two `-NH_(2)` group.B. A compound with two carbon atoms and a `-NH_(2)` group.C. A compound with a `-NH_(2)` group on the carbon atom in number two position.D. A compound in which two of the hydrogens of `NH_(3)` have been replaced by alkyl or aryl groups.
Answer» Correct Answer - D

Discussion

15.	Which of the following amines will form stable doazonium salt at `273-283K`?A. EthylamineB. AnilineC. DimethylamineD. Benzylamine
Answer» Correct Answer - B

Discussion

16.	Which of the following compounds possesses a chiral nitrogen atom ?A. `CH_(3)CH_(2)overset(CH_(3))overset(\|)NCH_(2)CH_(3)`B. `CH_(3)CH_(2)NHCH_(2)CH_(3)`C. `CH_(3)CH_(2)CH_(2)overset(CH_(3))overset(\|)NCH_(2)CH_(3)`D. `CH_(3)CH_(2)overset(NH_(2))overset(\|)CHCH_(3)`
Answer» Correct Answer - C In this molecule of `3^(@)` amine the N atom is bonded to three different alky1 groups and carries an unshared electron pair as the fourth different group .

Discussion

17.	Consider the following sequence of reactions: [P] gives coloured precipitate with benzaldehyde. What would be the structure of [P]?A. B. C. D.
Answer» Correct Answer - C

Discussion

18.	When stannous chloride and hydrochloric acid are used as the reducing agents nitrocompound are converted into .A. primary aminesB. N-alky1 hydroxylamineC. oximeD. A mixture of (2) and (3)
Answer» Correct Answer - D A mixture of N-alkylhydroxylamine and oxime is obtained `RCH_(2)NO_(2)overset(SnCI_(2)//HCI)rarrRCH_(2)NHOH+RCh=NOH` Nitro compounds are converted into an N-alklhydroxylamine when the reduction with metal is carried out in neutral solution e.g with zinc dust and ammonium chloride solution `RNO_(2)overset(Zn//NH_(4)C)rarrRNHOH+H_(2)O` Since hydroxylamine `(NH_(2)OH)` can give rise to two types of derivatives `RNHOH` and `NH_(2)OR` it is essential to distinguish one form from the other A common method is to name the former as the N-alkylhydroxyylamine and the latter the `O` alkylhydroxylamine the capital letters `N` and `O`, respectively indicating where the alkyl group is boded in the molecule .

Discussion

19.	Isobutylamine is an example of ………a. 2° amine b. 3° amine c. 1° amine d. quaternary ammonium salt.
Answer» Correct answer is a. 2° amine

19.

Isobutylamine is an example of ………a. 2° amine b. 3° amine c. 1° amine d. quaternary ammonium salt.

Answer»

Correct answer is

a. 2° amine

Discussion

20.	Which of the following is a primary amine .?A. t-ButylamineB. IsobutylamineC. t-ButylamineD. All of these
Answer» Correct Answer - D A primary amine is always characterized by the general formula `R -NH_(2)` or `ArNH_(2)` Make the structure of every compound. `underset("t-Butylamine")(CH_(3)-overset(CH_(3))overset(\|)underset(CH_(3))underset(\|)(C)-NH_(2)) " " underset("Isobutylamine")(CH_(3)-overset(CH_(3))overset(\|)(C)H-CH_(2)-NH_(2))` `underset("s-Butylamine")(CH_(3)overset(NH_(2))overset(\|)(C)H-CH_(2)-CH_(3))`

Discussion

21.	The `IUPA` name of t-butylamine isA. 1,1-dimethyethanamineB. 2-methylpropan-1amineC. N,1-dimethy-1-N-propylpropanamineD. s-butylmethy1-n-propylamine
Answer» Correct Answer - D Mak the structure by attaching t-buty1 group to `-NH_(2)` group `underset("2-Methylpropan-2amine")(CH_(3)-overset(.^(1)CH_(3))overset(2\|)underset(.^(3)CH_(3))underset(\|)(C)-NH_(2)`

Discussion

22.	Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide. Give reasons.
Answer» Due to electron releasing methyl group (+I effect) , methyl amine is more basic than water. Thus it produces OH^- ions by accepting H⁺ ions from water. CH₃-NH₂ + H-OH → CH₃NH₃⁺ + OH Ferric chloride dissociates into water to form Fe³⁺ & Cl^- ions. OH^- ions reacts with Fe³⁺ ions to form a ppt of hydrated ferric oxide. 2Fe³⁺ + 6OH^- → Fe₂O₃.3H₂O

22.

Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide. Give reasons.

Answer»

Due to electron releasing methyl group (+I effect) , methyl amine is more basic than water. Thus it produces OH^- ions by accepting H⁺ ions from water.

CH₃-NH₂ + H-OH → CH₃NH₃⁺ + OH

Ferric chloride dissociates into water to form Fe³⁺ & Cl^- ions. OH^- ions reacts with Fe³⁺ ions to form a ppt of hydrated ferric oxide.

2Fe³⁺ + 6OH^- → Fe₂O₃.3H₂O

Discussion

23.	In a set of reactions propionic acid yielded a compound `D` `CH_(3)CH_(2)COOHoverset(SOCI_(2))rarrBoverset(NH_(3))rarrCunderset(Br_(2))overset(KOH)rarrD` The structure of `D` would be .A. `CH_(3)CH_(2)NH_(2)`B. `CH_(3)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D. `CH_(3)CH_(2)NH_(2)`
Answer» Correct Answer - A The last step involves Hofmann bromamide degradation reaction `CH_(3)CH_(2)COOHoverset(SOCI_(2))rarrCH_(3)underset((B))(VH_(2)COCIoverset(Nh_(3))rarr` `CH_(3)CH_(2)underset( C)CONH_(2)underset(Br_(2))overset(KOH)rarr CH_(3)underset((D))CH_(2)NH_(2)` .

Discussion

24.	Aliphatic amines are ____________ basic than `NH_(3)` but aromatic amines are ______________ basic than `NH_(3)`A. More lessB. Less,moreC. Both (1) & (2)D. None of these
Answer» Correct Answer - A

Discussion

25.	a) The most basic compound among the following is i) C2H5NH2ii) C6H5NH2iii) NH3iv) (C2H5)2NHb) Compound A is treated with Ethanolic NaCN to give the compound C2H5CN(B). Compound B on reduction gives compound C. Identify compounds A and C.
Answer» a) iv) (C₂H₅)₂NH b) A-C₂H₅-X ethyl halide C → C₂H₅-CH₂NH₂ propanamide

25.

a) The most basic compound among the following is i) C2H5NH2ii) C6H5NH2iii) NH3iv) (C2H5)2NHb) Compound A is treated with Ethanolic NaCN to give the compound C2H5CN(B). Compound B on reduction gives compound C. Identify compounds A and C.

Answer»

a) iv) (C₂H₅)₂NH

b) A-C₂H₅-X ethyl halide

C → C₂H₅-CH₂NH₂ propanamide

Discussion

26.	Ethylamine is soluble in water whereas aniline is not soluble in water.
Answer» Ethylamine is soluble in water due to formation of H-bonding with water, but due to bulky phenyl group (larger hydrocarbon part) aniline does not form H-bond and thus is insoluble in water.

Discussion

27.	The reaction which is given only by primary amines is :(a) acetylation (b) alkylation (c) reaction with HNO2(d) carbyl amine test
Answer» Option : (d) carbyl amine test

Discussion

28.	The true statement about ethylamine is :(a) it is weaker base than ammonia (b) it is stronger base than diethyl amine (c) it is stronger base than triethyl amine (d) it is stronger base than alkali
Answer» Option : (c) it is stronger base than triethyl amine

Discussion

29.	Considering the basic strength in the gas phase which one has the smallest `pK_(a)` ? .A. `(CH_(3))_(3)N`B. `NH_(3)`C. `(CH_(3))_(2)NH`D. `Ch_(3)NH_(2)`
Answer» Correct Answer - B lower `pK_(a)rarr` higher `pK_(b)rarr` lower `K_(b)rarr` weak base All the aliphatic amines are stronger bases than ammonia Basicity is controlled by the availability of the lone pair for protonation Because of the positive inductive effect of alky1 groups the lone pair becomes more available Therefore the basicity increases with the number of alky1 groups `(CH_(3))_(3)Ngt(CH_(3))_(2)NHgtCH_(3)NH_(2)gtNH_(3)` .

Discussion

30.	Considering the basic strength of amines in aqueous sloution which one has the smallest `pk_(b)` value .A. `(CH_(3))_(3)N`B. `C_(6)H_(5)NH_(2)`C. `(CH_(3))_(2)N`D. `Ch_(3)NH_(2)`
Answer» Correct Answer - C Smallest `pK_(0)` means highest `K_(b)` value i.e the strongest base Aliphatic amines are more basic than aromatic amines `(CH_(3))_(2)NHgtCH_(3)NH_(2)gt(CH_(3))_(3)N` `(CH_(3))_(2)NH` is most basic as the resulting positive ion is most stable on account of `+1` effect of alkyl groups as well as effective solvation of cation .

Discussion

31.	Identify the statement about the basic nature of amines :(a) Alkylamines are weaker bases than ammonia. (b) Arylamines are stronger bases than alkylamines. (c) Secondary aliphatic amines are stronger bases than primary aliphatic amines. (d) Tertiary aliphatic amines are weaker bases than arylamines.
Answer» Option : (c) Secondary aliphatic amines are stronger bases than primary aliphatic amines.

Discussion

32.	Which of the following amines is most basic in nature?(a) 2, 4-Dichloroaniline (b) 2, 4-Dimethylaniline (c) 2, 4-Dinitroaniline (d) 2, 4-Dibromoaniline
Answer» Option : (b) 2, 4-Dimethylaniline

Discussion

33.	Identify 'A' in the following reaction :(a) CH3COONa(b) CH3COCI(c) (CH3CO)2O(d) CH3I
Answer» Option : (c) (CH₃CO)₂O

Discussion

34.	Amines are basic in nature :(a) as they have a fishy odour(b) as they form quaternary ammonium salts with alkyl halides (c) due to the presence of an unshared pair of electrons on the nitrogen atom (d) all of these
Answer» Option : (c) due to the presence of an unshared pair of electrons on the nitrogen atom.

Discussion

35.	The major product (X) of the reaction is: `overset(H_(2),Ni)underset(Delta)rarr X`A. B. C. D.
Answer» Correct Answer - C

Discussion

36.	The product formed in the reaction is: `overset(1.LiAlH_(4))underset(2.H_(2)O)rarr`A. B. C. `H_(3)C-underset(H)underset(\|)(N)-(CH_(2))_(3)-overset(O)overset(\|\|)(C)-H`D. `H_(3)C-underset(H)underset(\|)(N)-(CH_(2))_(3) -CH_(2)OH`
Answer» Correct Answer - B

Discussion

37.	Arrange the following compounds in decreasing order of basic strength in their aqueous solutions :NH3,C2H5NH2,(CH3)2NH,(CH3)3N
Answer» The decreasing order of basic strength is – (C₂H₅)₂NH > (C₂H₅)₃N > (C₂H₅)₂NH > NH₃ (The reason that ethyl group has greater +1 effect than methyl group).

37.

Arrange the following compounds in decreasing order of basic strength in their aqueous solutions :NH3,C2H5NH2,(CH3)2NH,(CH3)3N

Answer»

The decreasing order of basic strength is –

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

(The reason that ethyl group has greater +1 effect than methyl group).

Discussion

38.	n-propyl alcohol is obtained when HNO2 is treated with :(c) CH3-CH2-CH2-NH2(d) (C2H5)2NH
Answer» Option : (c) CH₃-CH₂-CH₂-NH₂

Discussion

39.	In the acetylation reaction the H-atom of an amine is replaced by :(a) a carbonyl group (b) an alkyl group (c) an acetyl group (d) an imino group
Answer» Option : (c) an acetyl group

Discussion

40.	Which of the following compounds does not liberate `N_(2)` on treatement with `HNO_(2)`?A. `H_(3)C-overset(O)overset(\|\|)(C )-NH_(2)`B. `H_(2)N-overset(O)overset(\|\|)(C)-NH_(2)`C. D. `H_(3)C-underset(H)underset(\|)(N)-CO_(3)`
Answer» Correct Answer - D

Discussion

41.	Pheny1 isocyanide is prepared fromA. Wurtz reactionB. Reimer-Tiemann reactionC. Carbylamine reactionD. Rosenmund s reaction
Answer» Correct Answer - C Aliphatic as well as aromatic primary amines on heating with chloroform and ethanolic potssium hydroxide form isocyanides or carbylamines which are foul smelling substances `underset(ArNH_(2))overset(RNH_(2))or+CHCI_(3)+KOHoverset(Delta)rarroverset(R-NC)underset(Ar-NC)(or+)3KCl+3H_(2)O` secondary and tertiary amines do not show this reactions which is known as carbylamine reaction .

Discussion

42.	A mixture of CH3NH2, (CH3)2NH,(CH3)3N can be distinguished by using :(a) HCI (b) HNO2(c) HNO3 (d) H2SO4
Answer» Option : (b) HNO₂

Discussion

43.	Which one is more basic CH3NH2 or (CH3)3N in gaseous phase and why ?
Answer» (CH₃)₃N is more basic because greater number of alkyl groups increase the magnitude of +I effect so increase the basicity.

Discussion

44.	An amine reacts with `C_(6)H_(5)SO_(2)Cl` and the product is soluble in alkali, amine isA. `1^(@)` amineB. `2^(@)` amineC. `3^(@)` amineD. All of these
Answer» Correct Answer - A

Discussion

45.	Out of Butan-1-ol and butan-1-amine ,which will be more soluble in water and why?
Answer» Butan-1-ol are more polar than amines and forms stronger intermolecular hydrogen bonds with water molecules than amines.

Discussion

46.	Give a plausible explanation for each of thefollowing statements :Butan-1-amine has higher boiling point than N-ethylethanamine.
Answer» Due to the presence of two H-atoms on N-atom in butain- 1-amine, they undergo extensive intermolecular H-bonding while in N-cthylethanamine due to the presence of one-H atom on the N-atom, they undergo least intermolecular H-bonding. Hence, Butan-1-amine has higher boiling point than-N-ethyl ethanamine.

46.

Give a plausible explanation for each of thefollowing statements :Butan-1-amine has higher boiling point than N-ethylethanamine.

Answer»

Due to the presence of two H-atoms on N-atom in butain- 1-amine, they undergo extensive intermolecular H-bonding while in N-cthylethanamine due to the presence of one-H atom on the N-atom, they undergo least intermolecular H-bonding.

Hence,

Butan-1-amine has higher boiling point than-N-ethyl ethanamine.

Discussion

47.	Give a plausible explanation for each of thefollowing statements :pKb value of diethyl amine is less than that of ethyl amine.
Answer» The basic strength of amines is expressed in terms of pK_b values. Smaller is the value of pK_b more basic is the amine. The pK_b value of ethyl amine is 3.29 and that of diethyl amine is 3.00. Therefore, Diethyl amine is more basic than ethyl amine.

47.

Give a plausible explanation for each of thefollowing statements :pKb value of diethyl amine is less than that of ethyl amine.

Answer»

The basic strength of amines is expressed in terms of pK_b values.

Smaller is the value of pK_b more basic is the amine.

The pK_b value of ethyl amine is 3.29 and that of diethyl amine is 3.00.

Therefore,

Diethyl amine is more basic than ethyl amine.

Discussion

48.	Arrange the following compounds in the decreasing order of their solubility in water :(a) Ethyl amine, diethyl amine and triethyl amine.(b) Ethyl amine, n-propyl amine and n-butyl amine.(c) n-Butane, n -butyl alcohol and n-butyl amine.
Answer» (a) Ethyl amine, diethyl amine and triethyl amine : Diethyl amine > triethyl amine > ethyl amine (The reason that ethyl group has greater +1 effect than methyl group) (b) Ethyl amine, n-propyl amine and n-butyl amine : n-butyl amine < n-propyl amine < ethyl amine (c) n-Butane, n -butyl alcohol and n-butyl amine : n-butyl alcohol < n-butyl amine < n-butane

48.

Arrange the following compounds in the decreasing order of their solubility in water :(a) Ethyl amine, diethyl amine and triethyl amine.(b) Ethyl amine, n-propyl amine and n-butyl amine.(c) n-Butane, n -butyl alcohol and n-butyl amine.

Answer»

(a) Ethyl amine, diethyl amine and triethyl amine :

Diethyl amine > triethyl amine > ethyl amine

(The reason that ethyl group has greater +1 effect than methyl group)

(b) Ethyl amine, n-propyl amine and n-butyl amine :

n-butyl amine < n-propyl amine < ethyl amine

(c) n-Butane, n -butyl alcohol and n-butyl amine :

n-butyl alcohol < n-butyl amine < n-butane

Discussion

49.	Which one of the following compounds does not react with acetyl chloride?a. CH3 -CH2 -NH2b. (CH3 -CH2)2 NH c. (CH3 -CH2)3 N d. C6H5 -NH2
Answer» Correct answer is c. (CH₃ -CH₂)₃ N

49.

Which one of the following compounds does not react with acetyl chloride?a. CH3 -CH2 -NH2b. (CH3 -CH2)2 NH c. (CH3 -CH2)3 N d. C6H5 -NH2

Answer»

Correct answer is

c. (CH₃ -CH₂)₃ N

Discussion

50.	Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? a. Ethylamine b. Triethylamine c. Trimethylamine d. Diethylamine
Answer» Correct answer is a. Ethyl amine

50.

Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? a. Ethylamine b. Triethylamine c. Trimethylamine d. Diethylamine

Answer»

Correct answer is

a. Ethyl amine

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is most basic?A. B. C. D.

Which of the follwing compounds is most basic ? .A. B. C. D.

`C_(3)H_(9)N` cannot representA. `1^(@)`B. `2^(@)` amineC. `3^(@)` amineD. quaternary salt

Which of the follwing are used as urfactants ? .A. Quaternary ammonium saltsB. Diazonium saltsC. Aminium saltsD. Ammonium salts

Ritter reaction is a good method for preparing primary amines containing a .A. primary alky1 groupB. secondary alky1 groupC. tertiary alky1 groupD. quaternary alky1 group

The end prouct `(B)` formed in the reaction `RNCoverset(HgO)rarrAunderset(Delta)overset(KOH)rarrB` is .A. `RNH_(2)`B. `RCH_(2)NH_(2)`C. `RNHCH_(3)`D. `RNHR`

The end product `(B)` formed in the reaction `CH_(3)CH_(2)Broverset(AgCN)rarrAunderset(2H_(3)O^(+))overset("1.NaOH Prolonged heat")rarr` is .A. `CH_(3)CH_(2)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D. `(CH_(3)CH_(2))_(3)N`

Consider the following sequence of reactions: `overset(C CI_(4))underset(Delta)rarr A overset(1.CH_(2)=CH-CH_(2)Br)underset(2.H_(3)O^(o+),Delta)rarrB` The end product (B) is:A. B. C. D.

`CH_(3)CH_(2)Br overset(AgCN)rarr A overset(NaOH, Delta)underset(overset(o+)(H_(3)O))rarrB,(B)` is:A. `CH_(3)CH_(2)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D.

Consider the following sequence of reactions `C_(6)H_(5)CH_(2)Ioverset(KCH)rarrA overset(H_(2)//Ni)rarrB` the final product `(B)` is .A. `C_(6)H_(5)CH_(2)CH_(2)NH_(2)`B. `C_(6)H_(5)CH_(2)NH_(2)`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NHCH_(3)`

Coupling of diazonium salts of following takes place in the order

Which of the following compounds is chiral? .A. `CH_(3)CH_(2)overset(..)NHCH_(3)`B. `CH_(3)CH_(2)CH_(2)overset(CH_(3))overset(|)underset(..)(N)CH_(2)CH_(2)CH_(3)`C. `CH_(3)CH_(2)CH_(2)underset(CH_(2)CH_(3))underset(|)overset(CH_(2)C_(6)H_(5))overset(|)(N^(+))Brbar`D. all of these

Which of the following amines will form stable doazonium salt at `273-283K`?A. EthylamineB. AnilineC. DimethylamineD. Benzylamine

Which of the following compounds possesses a chiral nitrogen atom ?A. `CH_(3)CH_(2)overset(CH_(3))overset(|)NCH_(2)CH_(3)`B. `CH_(3)CH_(2)NHCH_(2)CH_(3)`C. `CH_(3)CH_(2)CH_(2)overset(CH_(3))overset(|)NCH_(2)CH_(3)`D. `CH_(3)CH_(2)overset(NH_(2))overset(|)CHCH_(3)`

Consider the following sequence of reactions: [P] gives coloured precipitate with benzaldehyde. What would be the structure of [P]?A. B. C. D.

When stannous chloride and hydrochloric acid are used as the reducing agents nitrocompound are converted into .A. primary aminesB. N-alky1 hydroxylamineC. oximeD. A mixture of (2) and (3)

Isobutylamine is an example of ………a. 2° amine b. 3° amine c. 1° amine d. quaternary ammonium salt.

Which of the following is a primary amine .?A. t-ButylamineB. IsobutylamineC. t-ButylamineD. All of these

The `IUPA` name of t-butylamine isA. 1,1-dimethyethanamineB. 2-methylpropan-1amineC. N,1-dimethy-1-N-propylpropanamineD. s-butylmethy1-n-propylamine

Methyl amine in water reacts with ferric chloride to precipitate hydrated ferric oxide. Give reasons.

In a set of reactions propionic acid yielded a compound `D` `CH_(3)CH_(2)COOHoverset(SOCI_(2))rarrBoverset(NH_(3))rarrCunderset(Br_(2))overset(KOH)rarrD` The structure of `D` would be .A. `CH_(3)CH_(2)NH_(2)`B. `CH_(3)CH_(2)NH_(2)`C. `CH_(3)CH_(2)NH_(2)`D. `CH_(3)CH_(2)NH_(2)`

Aliphatic amines are ____________ basic than `NH_(3)` but aromatic amines are ______________ basic than `NH_(3)`A. More lessB. Less,moreC. Both (1) & (2)D. None of these

a) The most basic compound among the following is i) C2H5NH2ii) C6H5NH2iii) NH3iv) (C2H5)2NHb) Compound A is treated with Ethanolic NaCN to give the compound C2H5CN(B). Compound B on reduction gives compound C. Identify compounds A and C.

Ethylamine is soluble in water whereas aniline is not soluble in water.

The reaction which is given only by primary amines is :(a) acetylation (b) alkylation (c) reaction with HNO2(d) carbyl amine test

The true statement about ethylamine is :(a) it is weaker base than ammonia (b) it is stronger base than diethyl amine (c) it is stronger base than triethyl amine (d) it is stronger base than alkali

Considering the basic strength in the gas phase which one has the smallest `pK_(a)` ? .A. `(CH_(3))_(3)N`B. `NH_(3)`C. `(CH_(3))_(2)NH`D. `Ch_(3)NH_(2)`

Considering the basic strength of amines in aqueous sloution which one has the smallest `pk_(b)` value .A. `(CH_(3))_(3)N`B. `C_(6)H_(5)NH_(2)`C. `(CH_(3))_(2)N`D. `Ch_(3)NH_(2)`

Which of the following amines is most basic in nature?(a) 2, 4-Dichloroaniline (b) 2, 4-Dimethylaniline (c) 2, 4-Dinitroaniline (d) 2, 4-Dibromoaniline

Identify 'A' in the following reaction :(a) CH3COONa(b) CH3COCI(c) (CH3CO)2O(d) CH3I

Amines are basic in nature :(a) as they have a fishy odour(b) as they form quaternary ammonium salts with alkyl halides (c) due to the presence of an unshared pair of electrons on the nitrogen atom (d) all of these

The major product (X) of the reaction is: `overset(H_(2),Ni)underset(Delta)rarr X`A. B. C. D.

The product formed in the reaction is: `overset(1.LiAlH_(4))underset(2.H_(2)O)rarr`A. B. C. `H_(3)C-underset(H)underset(|)(N)-(CH_(2))_(3)-overset(O)overset(||)(C)-H`D. `H_(3)C-underset(H)underset(|)(N)-(CH_(2))_(3) -CH_(2)OH`

Arrange the following compounds in decreasing order of basic strength in their aqueous solutions :NH3,C2H5NH2,(CH3)2NH,(CH3)3N

n-propyl alcohol is obtained when HNO2 is treated with :(c) CH3-CH2-CH2-NH2(d) (C2H5)2NH

In the acetylation reaction the H-atom of an amine is replaced by :(a) a carbonyl group (b) an alkyl group (c) an acetyl group (d) an imino group

Which of the following compounds does not liberate `N_(2)` on treatement with `HNO_(2)`?A. `H_(3)C-overset(O)overset(||)(C )-NH_(2)`B. `H_(2)N-overset(O)overset(||)(C)-NH_(2)`C. D. `H_(3)C-underset(H)underset(|)(N)-CO_(3)`

Pheny1 isocyanide is prepared fromA. Wurtz reactionB. Reimer-Tiemann reactionC. Carbylamine reactionD. Rosenmund s reaction

A mixture of CH3NH2, (CH3)2NH,(CH3)3N can be distinguished by using :(a) HCI (b) HNO2(c) HNO3 (d) H2SO4

Which one is more basic CH3NH2 or (CH3)3N in gaseous phase and why ?

An amine reacts with `C_(6)H_(5)SO_(2)Cl` and the product is soluble in alkali, amine isA. `1^(@)` amineB. `2^(@)` amineC. `3^(@)` amineD. All of these

Out of Butan-1-ol and butan-1-amine ,which will be more soluble in water and why?

Give a plausible explanation for each of thefollowing statements :Butan-1-amine has higher boiling point than N-ethylethanamine.

Give a plausible explanation for each of thefollowing statements :pKb value of diethyl amine is less than that of ethyl amine.

Arrange the following compounds in the decreasing order of their solubility in water :(a) Ethyl amine, diethyl amine and triethyl amine.(b) Ethyl amine, n-propyl amine and n-butyl amine.(c) n-Butane, n -butyl alcohol and n-butyl amine.

Which one of the following compounds does not react with acetyl chloride?a. CH3 -CH2 -NH2b. (CH3 -CH2)2 NH c. (CH3 -CH2)3 N d. C6H5 -NH2

Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent? a. Ethylamine b. Triethylamine c. Trimethylamine d. Diethylamine