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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
How many primary amines including stereoisomers are possible for the molecular formula `C_(4)H_(11)N` .A. 1B. 2C. 3D. 4 |
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Answer» Correct Answer - D The possible primary amines (containing `-NH_(2)` group) are (1) `CH_(3)CH_(2)CH_(2)CH_(2)NH_(2)` (2) `{:(CH_(3)CH_(2)-CH-CH_(3)),(" |"),(" "NH_(2)):}` (3) `{:(CH_(3)-CH-CH_(2)NH_(2)),(" |"),(" "CH_(3)):}` (4) `{:(" "CH_(3)),(" |"),(CH_(3)-C-NH_(2)),(" |"),(" "CH_(3)):}` |
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| 102. |
The main product of the reaction `CH_(3)CONH_(2)+NaOBr rarr` ........ IsA. `CH_(3)Br`B. `CH_(4)`C. `CH_(3)OBr`D. `CH_(3)NH_(2)` |
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Answer» Correct Answer - D `CH_(3)CONH_(2)+NaOBr rarr CH_(3)NH_(3)+NaBr+CO_(2)` |
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| 103. |
Assertion (A) : Amides give primary amines with hydrobromides. Reason (R): The reaction of amides with alkali is a qualitative test for `CONH_(2)` group.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true but R is not a correct explanation of A.C. A is true but R is false.D. A is false but R is false. |
| Answer» Correct Answer - B | |
| 104. |
Assertion (A) : Amines are more basic than ethers and esters. Reason (R) : Nitrogen is less electronegative than oxygen, it is in better position to accommodate the positive charge on the proton.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true but R is not a correct explanation of A.C. A is true but R is false.D. A is false but R is false. |
| Answer» Correct Answer - A | |
| 105. |
Amongest the following the most basic in nature isA. benzylamineB. anilineC. acetamideD. p-nitroaniline. |
| Answer» Correct Answer - A | |
| 106. |
Amongst the following the most basic compound is :A. benzylamineB. anilineC. acetanilideD. p-nitroaniline. |
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Answer» Correct Answer - A `C_(6)H_(5)CH_(2)NH_(2)` is an aralkylamine and is strongest amine. (B) and (D) are aromatic amines while (C) is an amide which is neutral. |
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| 107. |
Indicate which nitrogen compound amongst the following would undergo Hoffmann reaction (i.e., reaction with `Br_(2)` and strong (KOH) to furnish the primary amine `(R - NH_(2))`A. `RCONHCH_(3)`B. `RCOONH_(4)`C. `RCONH_(2)`D. `R-CO-NHOH`. |
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Answer» Correct Answer - C `R-overset(O)overset("||")(C)-NH_(2)` |
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| 108. |
4-Propene `underset(778K)overset(Cl_(2))rarr X overset(alc. NH_(3))rarr Y` isA. AllylamineB. `n-`PropylamineC. 1, 2-DiaminopropaneD. 2-Phenyl ethylamine |
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Answer» Correct Answer - A `CH_(2)=CH-CH_(3) overset(Cl_(2)//778 K)(rarr) CH_(2)=CHCH_(2)Cl underset("excess")overset(NH_(3))(rarr) underset("Allylamine")(CH_(2)=CH-CH_(2)NH_(2))` |
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| 109. |
`H_(3)C - overset(O)overset(||)(C) - COOH underset((ii) H_(2)//Pd)overset((i) NH_(3)) rarr (A)`. Identify (A)A. `CH_(3)CONH_(2)`B. `H_(3)C - overset(O)overset(||)(C) - CONH_(2)`C. `CH_(3)CH_(2) CONH_(2)`D. `CH_(3)CH (NH_(2)) COOH` |
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Answer» Correct Answer - D `CH_(3)-CH(NH_(2))COOH`. |
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| 110. |
The reduction of which of the following compounds would yields secondary amineA. alkyl nitrileB. carbylamineC. primary amineD. sec. nitro compound |
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Answer» Correct Answer - B `underset("Carbylamine")(R-N equiv C)+2H_(2) overset(Ni)(rarr)underset(2^(@)" amine")(R-NH-CH_(3))` |
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| 111. |
Which of the following compounds cannot be identified by carbyl amine test ?A. `C_(6)H_(5)NHC_(6)H_(5)`B. `CH_(3)CH_(2)NH_(2)`C. `CHCl_(3)`D. `C_(6)H_(5)NH_(2)`. |
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Answer» Correct Answer - A `1^(@)` Amines (aliphatic or aromatic) respond to carbylamine test. Also `CHCl_(3)` gives carbylamine when heated with `1^(@)` Amine and `KOH`. |
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| 112. |
During nitration of benzene withnitrating mixture, `HNO_(3)` acts asA. baseB. acidC. reducing agentD. catalyst. |
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Answer» Correct Answer - A See preparation of nitrobenzene. |
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| 113. |
`R-N-=C + 2HgO rarr X + Hg_(2)O` Identify X in the above reactionA. `RNH_(2)`B. `RCONH_(2)`C. `R-NCO`D. `RCOOH` |
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Answer» Correct Answer - C `R-N equiv C+2HgO rarr R-underset((X))(N=C)=O+Hg_(2)O` |
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| 114. |
Which of the following is not correctly named ?A. `NH_(2) - [CH_(2)]_(3) - NH_(2), 1, 3-`Diaminopropane or trimethylene diamineB. `C_(6)H+_(5) - N (CH_(3))_(2)`, N-phenyl methylamineC. `CH_(3) - NH - [CH_(2)]_(2) NH - CH_(3)` 2, 5-Diazohexane |
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Answer» Correct Answer - B Correct name of `underset("N-Methyl-N-phenylmethylamine")(C_(6)H_(5)-N(CH_(3))_(2))` |
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| 115. |
An organic compound X reacts with nitrous acid to form `N-`methyl`-N-`nitrosoethanamine. X can be obtained by reduction ofA. PropanenitrileB. AcrylonitrileC. Methyl isocyanateD. Ethyl isocyandie |
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Answer» Correct Answer - D `{:(" "CH_(3)),(" |"),(C_(2)H_(5)N overset(rarr)(=)C overset("Reduction")(rarr)C_(2)H_(5)NH-CH_(3) overset(HONO)(rarr) C_(2)H_(5)-N-NO),(" (X)"" N-Methyl-N-"),(" nitrosoethanamine"):}` |
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| 116. |
In basicity of aniline is weaker in comparison to that of methylamine due toA. hyperconjugative effect of Me group of `MeNH_(2)`B. resonance effect of phenyl group in anilineC. lower molecular mass of methylamine as compared to that of anilineD. resonance effect of `-NH_(2)` group in `MeNH_(2)` |
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Answer» Correct Answer - B The lone pair of electrons of nitrogen atom in aniline takes part in resonance and thus is not available for donation to protons. Thus aniline is less basic than `CH_(3)NH_(2)` in which `CH_(3)` group exhibits +I effect |
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| 117. |
Methylamine reacts with nitrous acid to form :A. `CH_(3)CH_(3)`B. `CH_(3)NO_(2)`C. `CH_(3)OH`D. `CH_(3)CH_(2)OH`. |
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Answer» Correct Answer - C `CH_(3)NH_(2)+HNO_(2) rarr CH_(3)OH+H_(2)O+N_(2) uarr` |
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| 118. |
Ethylamine on reaction wih bromine in aq. Sodium carbonate solution givesA. Ethyl bromideB. N-Bromo-2-propanamineC. N-BromoethylethanamineD. N-Bromoethanamine. |
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Answer» Correct Answer - C This reaction is given only by primary and secondary amines on reaction with `Br_(2)` in weakly alkaline medium they form N-bromoamine. `C_(2)H_(5)NH_(2)+Br_(2) overset(aq. Na_(2)CO_(3))(rarr) underset("N-Bromoethylamine")(C_(2)H_(5)NHBr)+HBr` |
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| 119. |
Action of `HNO_(2)` on ethylamine givesA. EthaneB. `C_(2)H_(5)OH`C. ammoniaD. Nitromethane. |
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Answer» Correct Answer - B `C_(2)H_(5)NH_(2) overset(HONO)(rarr) C_(2)H_(5)OH+ N_(2)` |
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| 120. |
Which of the following will give white precipitate with an aqueous solution of ethylamine ?A. `[Ag(NH_(3))_(2)]^(+)`B. Iron (II) sulphateC. Zinc sulphateD. Cupric sulphate. |
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Answer» Correct Answer - C Aqueous solutions of `C_(2)H_(5)NH_(2)` contains `C_(2)H_(5-) overset(+)(NH)_(3)` and `OH^(-)` ions, which will react with zinc ions `(Zn^(2+))` to form white ppt. of `Zn(OH)_(2)`. |
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| 121. |
Deep blue colour formed by addition of copper (II) suphate solution to ethylamine is due to formation ofA. free `Cu^(2+)` ions in solutionB. `(NH_(4))_(2)SO_(4)`C. `[Cu(C_(2)H_(5)NH_(2))_(4)]^(2+)` ionsD. `Cu(OH)_(2)`. |
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Answer» Correct Answer - C `Cu^(2+)+4C_(2)H_(5)NH_(2) rarr underset("(Deep blue complex)")underset("Tetraethylamine Copper (II) ion")([Cu(C_(2)H_(5)NH_(2))_(4)]^(2+))` |
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| 122. |
Ethylamine can be prepared by the action of bromine and caustic potash onA. AcetamideB. PropionamideC. FormamideD. Methyl cyanide. |
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Answer» Correct Answer - B `underset("N-methyl ethan amide")(CH_(3)CONCH_(3)) overset(NaAlH_(4)//"ether")(rarr) underset("Ethylmethylamine")(CH_(3)CH_(2)NHCH_(3))` |
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| 123. |
Which of the following has the most stable conjugate acid ?A. `(CH_(3))_(2)NH`B. `(CH_(3))_(3)N`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NHCH_(3)`. |
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Answer» Correct Answer - C `C_(6)H_(5)-NH_(5)` because it has maximum number of protons. |
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| 124. |
Which of the following has the most stable conjugate acid in aqueous medium ?A. `(CH_(3))_(2)NH`B. `(CH_(3))_(3)N`C. `C_(6)H_(5)NH_(2)`D. `C_(6)H_(5)NHCH_(3)` |
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Answer» Correct Answer - C Most stable conjugate acid is the most stable protonated cation, whose stability depends on the extent of hydrogen bonding. |
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| 125. |
The conjugate base of `(CH_(3))_(2)overset(+)(NH_(2))` is :-A. `(CH_(3))_(3)N`B. `(CH_(3))_(2)NH`C. `(CH_(3))_(2) N^(-)`D. `(CH_(3))_(2) N^(+)` |
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Answer» Correct Answer - B `(CH_(3))_(2)NH_(2)^(+) underset(-H^(+))(rarr)(H_(3)C)_(2)NH`. |
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| 126. |
`NO_(2)^(+)` is calledA. Nitronium ionB. Nitrosonium ionC. Nitro groupD. None of above |
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Answer» Correct Answer - A `NO_(2)^(+)` is called as nitronium ion. |
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| 127. |
`p-`Nitrotoluene on further nitration gives |
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Answer» Correct Answer - A Another nitro group will be introduced at the position meta w.r.t. the nitro group already existing and ortho w.r.t. the `CH_(3)^(-)` group. Hence A is the correct choice. |
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| 128. |
When aniline is heated with glacial acetic acid in the presence of anhy. `ZnCl_(2)`, the product formed isA. AcetamideB. AcetanilideC. Phenyl acetamideD. Chlorobenzene |
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Answer» Correct Answer - B Acetanilide `C_(6)H_(5)-NH-overset(O)overset("||")(C)-CH_(3)` |
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| 129. |
Which of the following on hydrolysis forms acetic acid?A. `CH_(3)CN`B. `C_(2)H_(5)OH`C. `C_(2)H_(5)NH_(2)`D. `CH_(3)OH` |
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Answer» Correct Answer - A `CH_(3)CN overset(H_(2)O //H^(+))(rarr) CH_(3)COOH` |
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| 130. |
Select incorrect statementA. Methyl cyanide is reduced to methyl amine by `LiAlH_(4)`B. Methyl isocyanide is hydrolysed to methylamineC. Homologated `1^(@)` amine is obtained in the process `RBr overset(NaCN)(rarr)`D. Acetamide is reduced to ethylamine by `LiAlH_(4)`. |
| Answer» Correct Answer - A | |
| 131. |
The main product of bromination of acetanilide in glacial acetic acid isA. o-bromoanilineB. p-bromoanilineC. p-bromoacetanilideD. 2, 4, 6-tribromoacetanilide. |
| Answer» Correct Answer - B | |
| 132. |
`H-overset(O)overset("||")(C)-NHR underset("Pyridine")overset(POCl_(3))(rarr) X+H_(2)O` In this reaction X isA. `R-N=C=O`B. `R-CH-N-OH`C. `R-C equiv N`D. `R-N overset(rarr)(=)C` |
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Answer» Correct Answer - D `underset("N-Alkyl formamide")(R-NH-overset(O)overset("||")(C)-H) underset("Pyridine")overset(POCl_(3))(rarr) underset("Alkyl isocyanide")(R-N overset(rarr)(=)C+H_(2)O)` |
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| 133. |
Isopropylamine `overset(KMnO_(4))rarr X overset(H_(3)^(+)O)rarr Y` In the above sequence X and Y areA. Acetaldimine, ethanalB. Ethanal, ketimineC. Ketimine, acetoneD. Acetone, propan-2-ol |
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Answer» Correct Answer - C `{:(" "CH_(3)" "CH_(3)),(" |"" |"),(CH_(3)CH_(2)-NH_(2) overset(KMnO_(4))(rarr)CH_(3)-C=NH overset(H_(3)O^(+))(rarr)CH_(3)-C=O),(" Ketimine"" Acetone"):}` |
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| 134. |
1-Alkyl isocyanide on reduction with `Zn - Hg//HCl` givesA. `1^(@)` AminesB. `3^(@)` AmineC. N-AlkylalkanamineD. N-Methylalkanamine |
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Answer» Correct Answer - D `RN overset(rarr)(=)C underset(4 [H])overset(Zn-Hg//HCl)(rarr) underset("N-Methyl alkanamine")(R-NH-CH_(3))` |
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| 135. |
Consider the following reaction `C_(6)H_(5)NO_(2) overset(Sn//HCl)rarr X overset(C_(6)H_(5)COCl)rarr Y + HCl` What is Y ?A. AcetanilideB. BenzinilideC. AzobenzeneD. Hydrozobenzene |
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Answer» Correct Answer - B `C_(6)H_(5)NO_(2) overset(Sn//HCl)(rarr) underset("Aniline (X)")(C_(6)H_(5)NH_(2)) overset(CH_(3)COCl)(rarr) underset("Benzinilide (Y)")(C_(6)H_(5)NHCOC_(6)H_(5))+H_(2)O` |
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| 136. |
Reduction of benzenediazonium chloride with `SnCl_(2) + HCl`A. AnilineB. PhenylhydrazineC. AzobenzeneD. Hydrazobenzene |
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Answer» Correct Answer - B See properties of diazonium salt (B section) |
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| 137. |
`C_(6)H_(5)N^(+)Cl^(-) overset(x, y)(rarr) C_(6)H_(5)Cl+N_(2)` x and y in the above reaction areA. `CuCl_(2), HCl`B. `CuCl, HCl`C. `ZnCl_(2), HCl`D. `AlCl_(3), HCl`. |
| Answer» Correct Answer - B | |
| 138. |
Amongst the compounds given, the one that would form a brilliant coloured dye with `NaNO_(2)` in dil. HCl followed by addition to an alkaline solution of naphthol is |
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Answer» Correct Answer - C A coloured dye is formed by the reaction of diazonium salt with `beta`-naphthol. Diazonium compound is formed by the reaction of an aromatic primary amine with `HNO_(3) (NaNO_(2)+HCl)`. |
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| 139. |
The following reaction represents `C_(6)H_(5)N_(2) Cl + underset("Sodium arsenite")(Na_(3) AsO_(3)) underset((ii) HCl)overset((i) CuSO_(4))rarr underset("Phenyl arsonic acid")(C_(6)H_(5)AsO_(3)H_(2))`A. Schiemann reactionB. Bart reactionC. Gomberg reactionD. Gattermann reaction |
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Answer» Correct Answer - A See properties of diazonium salt (A section) |
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| 140. |
The final product in the following sequence of reaction is `C_(6)H_(5)NH_(2) underset(273 - 278 K)overset(NaNO_(2) + HCl)rarr A overset(NaOH)rarr B`A. `C_(6)H_(5)N_(2)Cl`B. `C_(6)H_(5)OH`C. `C_(6)H_(5) - C_(6)H_(5)`D. `C_(6)H_(5)N = NOH` |
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Answer» Correct Answer - D `C_(6)H_(5)NH_(2) underset(HCl, 278 K)overset(NaNO_(2))(rarr)underset((A))(C_(6)H_(5)N_(2)Cl) overset(NaOH)(rarr) C_(6)H_(5)-N=N-OH` |
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| 141. |
In the reaction `CH_(3) CN + 2H underset("ether")overset(2 HCl)rarr X underset(Delta) overset(H_(2)O)rarr Y. Y isA. dimethylamineB. ethanamineC. acetaldehydeD. acetone. |
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Answer» Correct Answer - C `CH_(3)CN+2H underset(("Stephen"),("reduction"))overset(HCl//"ether")(rarr)underset((X))underset(("Acetaldimine"),("hydrochloride"))(CH_(3)CH=NH.HCl) overset(H_(2)O //Delta)(rarr) underset("Acetaldehyde")(CH_(3)CHO)+NH_(4)Cl` |
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| 142. |
What is the end product in the following sequence of reaction ? Acetamide `underset("Heat")overset(P_(2)O_(5))rarr A underset(Zn//HCl)overset([H])rarr B`A. MethylamineB. EthylamineC. Methyl isocyanideD. Ammonium acetate |
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Answer» Correct Answer - B `underset("Acetamide")(H_(3)C-overset(O)overset("||")(C)-NH_(2)) underset(-H_(2)O)overset(P_(2)O_(5), Delta)(rarr)H_(3)C-C equiv N underset(4[H])overset(Zn//HCl)(rarr) underset("Ethylamine")(H_(3)C-CH_(2)-NH_(2))` |
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| 143. |
Assertion (A) : Cyclohexylamine is weaker than aniline. Reason (R) : The lone pair of electrons on nitrogen is delocalised over benzene nucleus in aniline. The lone pair of electrons on nitrogen in cyclohexyl amine is localised.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true but R is not a correct explanation of A.C. A is true but R is false.D. A is false but R is false. |
| Answer» Correct Answer - D | |
| 144. |
Which of the following is used to prepare aniline from chlorobenzene by reaction with ammonia ?A. `Cu`B. `Cu_(2)O`C. `Ni`D. `Pt` |
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Answer» Correct Answer - B `underset("Chlorobenzene")(2 C_(6)H_(5)Cl)+ 2NH_(3) + Cu_(2)O underset(600 atm)overset(475 K)(rarr) underset("Aniline")(2 C_(6)H_(5)NH_(2))+Cu_(2)Cl_(2)+H_(2)O` |
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| 145. |
Diazo coupling is useful to prepareA. PesticidesB. DyesC. ProteinsD. Vitamins |
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Answer» Correct Answer - B Dyes. |
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| 146. |
Benzene diazonium chloride when reduced with sodium sulphite yieldsA. ChlorobenzeneB. BenzeneC. Phenyl hydrazine chlorideD. Phenol |
| Answer» Correct Answer - C | |
| 147. |
Benzene diazonium chloride when reacted with hypophosphorus acid, produces :A. BenzeneB. PhenolC. Phenyl isocyanideD. Phenyl phosphate |
| Answer» Correct Answer - A | |
| 148. |
Benzene diazonium chloride forms orange red dye withA. PhenolB. CresolC. ResorcinolD. All |
| Answer» Correct Answer - D | |
| 149. |
Assertion (A) : `beta`-naphthol and benzene diazonium chloride react at low temperature to produce an azo dye. Reason (R) : The reaction with `beta`-Naphthol and Benzene diazonium chloride is called coupling reaction.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true but R is not a correct explanation of A.C. A is true but R is false.D. A is false but R is false. |
| Answer» Correct Answer - B | |
| 150. |
Nitration of aniline in strongly acidic medium, results in the formation of m-nitroaniline also. This is becauseA. amino group is meta orienting during electrophilic substitution reactionB. nitro group goes always to the meta position irrespective of the substituents.C. nitration of aniline is a nucleophilic substitution reaction in strongly acidic medium.D. in strongly acidic conditions aniline is present as anilinium ion |
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Answer» Correct Answer - D See reduction of nitrobenzene. |
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