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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.
| 1. |
Which of the following represents the poinsonous gas which caused the tragedy in Bhopal in `1984` ?A. `CH_(3)C=N=S`B. `CH_(3)-N=C=O`C. `CH_(3)-N=C=S`D. `CH_(3)-O-N=C` |
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Answer» Correct Answer - B `underset("Methyl isocyanate (MIC)")(H_(3)C-N=C=O)` |
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| 2. |
Which of the following is a secondary amine ?A. Isopropyl amineB. Sec-Butyl amineC. N-MethylbutanamineD. Diethylaniline |
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Answer» Correct Answer - C `underset(underset((2^(@)" Amime"))("N-methyl butanamine"))(H_(3)C-CH_(2)-CH_(2)-CH_(2)-NH-CH_(3))` |
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| 3. |
Secondary propyl amine isA. primary amineB. secondary amineC. tertiary amineD. none of these |
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Answer» Correct Answer - A `{:(H_(3)C-CH-CH_(3)),(" |"),(" "NH_(2)),("sec-Propylamine "(1^(@)" amine")):}` |
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| 4. |
The IUPAC name of acrylonitrile isA. vinyl cyanideB. ethenylnitrileC. prop-2-enenitrileD. cyanoethene |
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Answer» Correct Answer - C `underset("Prop-2-en nitrile")(H_(2) overset(3)(C)=overset(2)(C)H-overset(1)(C) equiv N)` |
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| 5. |
Which of the following of the following sequence will convert methyl cyanide to ethyl isocyanide ?A. `3_(square)^(+)O, LiAlH_(4), P//I_(2), AgCN`B. `LiAlH_(4), NaNO_(2)//HCl, KCN`C. `H_(3)O^(+), NH_(3), P_(2)O_(5)`D. none of the above. |
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Answer» Correct Answer - A `CH_(3)CN overset(H_(3)^(+)O)(rarr)CH_(3)COOH overset(LiAlH_(4))(rarr) CH_(3)CH_(2)OH overset(P//I_(2))(rarr) CH_(3)CHI overset(AgCN)(rarr)CH_(3)CH_(2)NC` |
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| 6. |
Ethyl isocyanide on hydrolysis in acidic medium generates:A. ethylamine salt and methanoic acidB. propanoic acid and ammonium saltC. ethanoic acid and ammonium saltD. mwthylamine salt and ethanoic acid. |
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Answer» Correct Answer - A See properties of isocyanides. |
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| 7. |
Methyl carbylamine is treated with ozone, the product isA. Formic acidB. Formic acid and methylamineC. Methyl isocyanateD. Formalimine |
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Answer» Correct Answer - C `underset("Carbylamine")underset("Methyl")(CH_(3)NC)+O_(3) rarr underset("Methyl isocyanate")(CH_(3)-N=C=O)+O_(2)` |
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| 8. |
When methyl carbylamine is heated for some time it is converted intoA. EthaneB. MethaneC. EthanamineD. Ethane nitrile. |
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Answer» Correct Answer - D `underset("Methyl carbylamine")(CH_(3)-N overset(rarr)(=)C) overset(Delta)(rarr)underset("Ethane nitrile")(CH_(3)-C equiv N)` |
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| 9. |
Which one of the following is called a carbylamineA. `RCN`B. `RCONH_(2)`C. `RCN=NH`D. `N NC`. |
| Answer» Correct Answer - D | |
| 10. |
Carbylamine test is given byA. AlcoholsB. Primary aminesC. Carboxylic acidD. Aldehyde. |
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Answer» Correct Answer - B `underset(1^(@)" amine")(RNH_(2))+3KOH+CHCl_(3) rarr underset(("Alkylisocyanide"),("(Bad smelling)"))(RNH+3KCl_+3H_(2)O` |
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| 11. |
Nitrobenzene on reaction with `HNO_(3)//H_(2)SO_(4)` on `80^(@)-100^(@)C` forms which one of the following productsA. 1,4-DinitrobenzeneB. 1, 2, 4-TrinitrobenzeneC. 1, 2-Dinitrobenzene.D. 1, 3-Dinitrobenzene. |
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Answer» Correct Answer - D `NO_(2)` is a m-directing group and hence 1, 3-dinitrobenzene is formed. |
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| 12. |
Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated withA. Any aliphatic amineB. Any amineC. Any primary amineD. Any aromatic amine. |
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Answer» Correct Answer - C Aliphatic as well as aromatic `1^(@)` amines respond to carbylamine test. |
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| 13. |
Why do `2^(@)` and `3^(@)` amines fail to undergo the carbylamine testA. The nitrogen atom of the amine group does not have the required number of hydrogen atomB. All the given reasons are correctC. They combine with chloroform to give a stable compoundD. They react with alcoholic KOH. |
| Answer» Correct Answer - A | |
| 14. |
Carbylamine test is performed in aloholic KOH by heating a mixture ofA. Chloroform and silver powderB. Trihalogenated methane and a primary amineC. An alkyl halids and a primary amineD. An alkyl cyanide and a primary amine. |
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Answer» Correct Answer - B Carbylamine test is performed in `KOH` by heating a mixture of trihalogenated methane (eg., `CHCl_(3)`) and a `1^(@)` amine. |
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| 15. |
The formation of m-dinitrobenzene by heating nitrobenzene with conc `H_(2)SO_(4)` is a/an .A. A conjugate acid base interactionB. A sulphonation processC. A Nucleophilic substitution.D. An electrophilic substitution. |
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Answer» Correct Answer - D Nitration of aromatic compounds is an electrophilic substitution reaction. |
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| 16. |
Butanenitrile may be prepared by heatingA. Propyl alcohol with KCNB. Butyl alcohol with KCNC. Butyl chloride with KCND. Propyl chloride with KCN. |
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Answer» Correct Answer - A `underset("Propyl chloride")(CH_(3)CH_(2)CH_(2)Cl)+KCN rarr underset("Butanenitrile")(CH_(3)CH_(3)CH_(2)CN)+KCl` |
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| 17. |
The compound that will react most readily NaOH to form methanol isA. `(CH_(3))_(4)N^(+)I^(-)`B. `CH_(3)OCH_(3)`C. `(CH_(3))_(3)S^(+) I^(-)`D. `(CH_(3))_(3)C Cl`. |
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Answer» Correct Answer - A `(CH_(3))_(4) overset(+)(N)I^(-)+NaOH rarr NaI+(CH_(3))_(3)N+CH_(3)OH` |
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| 18. |
Which of the following will give red colour with NaOH ?A. `R-overset(NH)overset("||")(C)-NO_(2)`B. `R-underset(NO_(2))underset(|)overset(R)overset(|)(C)-NO`C. `R_(2)C-NO_(2)`D. `R_(3)CONO`. |
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Answer» Correct Answer - A `{:(" "NOH),(" ||"),(R-C-NO_(2)):}` is nitrolic acid and it gives red colour with `NaOH`. |
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| 19. |
Which of the following reagents can distinguish primary amines and secondary amines ?A. `NH_(3)`B. `NaNO_(2)//HCl`C. `HCl`D. all the above. |
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Answer» Correct Answer - B `NaNO_(2)` reacts with `HCl` to give `HNO_(2)`. Nitrous acid gives different products with Primary and secondary amines. |
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| 20. |
Which one of the following methods is neither meant for the synthesis nor for separation of amines ?A. Hinsberg methodB. Hoffmann methodC. Wurtz reactionD. Curtius reaction. |
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Answer» Correct Answer - C Wurtz reaction `2RX+2Na overset("ether")(rarr) R-R+2NaX` is used to prepare alkanes. |
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| 21. |
The ease of substitution of H by nitro group in alkane follows the orderA. `3^(@)H lt 2^(@)H lt 1^(@)H`B. `3^(@)H gt 2^(@)H gt 1^(@)H`C. `3^(@)H lt 2^(@)H gt 1^(@)H`D. `3^(@) H gt 2^(@)H lt 1^(@)H`. |
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Answer» Correct Answer - B Nitration of alkane at `100^(@)C` follows free radical mechanism. The ease of replacement of `H^(@)` by `NO_(2)` follow the stability order of the free radical. |
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| 22. |
A `1^(@)` aliphatic nitro compound when treated with `H_(2)SO_(4)` givesA. an aldehydeB. a carboxylic acidC. an alcoholD. None of these. |
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Answer» Correct Answer - B `RCH_(2)NO_(2) overset(H_(2)SO_(4))(rarr) R-overset(O)overset("||")(C)-NHOH overset(H_(2)O)(rarr) R-overset(O)overset("||")(C)-OH+NH_(2)OH` |
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| 23. |
Among the following, the strongest base isA. `C_(6)H_(5) NH_(2)`B. `p-NO_(2)-C_(6)H_(4)NH_(2)`C. `m-NO_(2)-C_(6)H_(4)NH_(2)`D. `C_(6)H_(5)CH_(2)NH_(2)`. |
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Answer» Correct Answer - D Among the given species, benzyl amine is strongest base. |
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| 24. |
Which one of the following is the strongest base in aqueous solution?A. MethylamineB. TrimethylamineC. AnilineD. dimethylamine. |
| Answer» Correct Answer - D | |
| 25. |
Presence of a nitro group in a benzene ring:A. deactivates the ring towards electrophilic substitutionB. activates the ring towards electrophilic substitutionC. reduces the ring basicD. deeactivates the ring towards nucleophilic substitution. |
| Answer» Correct Answer - A | |
| 26. |
In the chemical reaction `CH_(3)CH_(2)NH_(2) + CHCI_(3) + 3KOH rarr (A) + (B) + 3H_(2)O` the compound `(A) `and `(B)` are respectivelyA. `C_(2)H_(5)NC` and `3 KCl`B. `C_(2)H_(5)CN` and `3KCl`C. `CH_(3)CH_(2)CONH_(2)` and `3 KCl`D. `C_(2)H_(5)NC` and `K_(2)CO_(3)`. |
| Answer» Correct Answer - A | |
| 27. |
Which of the following on boiling with `Na_(2)CO_(3)` (aq) gives aniline ?A. NitrobenzeneB. Anilinium chlorideC. ChlorobenzeneD. Benzene diazonium chloride |
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Answer» Correct Answer - B `underset("Anilinium chloride")(2C_(6)H_(5)-NH_(3)^(+)Cl^(-))+Na_(2)CO_(3) rarr underset("Aniline")(2C_(6)H_(5)NH_(2))+2NaCl+CO_(2)+H_(2)O` |
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| 28. |
In order to produce ethyl isothiocyanate, which of the following reagents are requiredA. Ethylamine and sulphurB. Ethanamide and sulphurC. Ethyl carbylamine and sulphurD. Ethyl cyanide and sulphur |
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Answer» Correct Answer - C `underset("Ethyl carbylamine")(2C_(2)H_(5)N overset(rarr)(=)C+)underset("Sulphur")(S) rarr underset("Ethyl isothiocyanide")(C_(2)H_(5)N=C=S)` |
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| 29. |
Ethyl magnesium bromide and chloramine react to produceA. Ethyl lamineB. Ethyl chlorideC. Ethyl alcoholD. Ethaneenitrile |
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Answer» Correct Answer - A `C_(2)H_(5)MgBr+ClNH_(2) rarr underset("Ethylamine")(C_(2)H_(2)NH_(2))+MgO` |
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| 30. |
Which of the following would react with nitrobenzene to give azoxybenzeneA. acidic glucose solutionB. `Zn, NaOH`C. `Zn//NaOH, CH_(3)OH`D. `Na_(3)AsO_(3) + NaOH` |
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Answer» Correct Answer - D See reduction of nitrobenzene. |
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| 31. |
Nitrobenzene can be converted into hydraxobenzene by reduction withA. Zn and alcoholic NaOHB. Zn and aqueous NaOHC. `NH_(2)NH_(2)` and alcoholic KOHD. Zn and HCl |
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Answer» Correct Answer - B See reduction of nitrobenzene. |
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| 32. |
A product of reaction between chloroform and ethanamine in KOH is allowed to react with `Cl_(2)`. The final product isA. Ethyl chlorideB. EthyledenedichlorideC. Ethylimino carbony chlorideD. Ethanol. |
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Answer» Correct Answer - C `C_(2)H_(5)NH_(2) overset(KOH//CHCl_(3))(rarr) C_(2)H_(5)N overset(rarr)(=) C` `C_(2)H_(5) overset(rarr)(=)C+Cl_(2) rarr C_(2)H_(5)-N=C Cl_(2)` |
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| 33. |
Which of the following is not an ambident nucleophile?A. `NO_(2)^(-)`B. `SCN^(-)`C. `CN^(-)`D. |
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Answer» Correct Answer - B `OH^(-)`, as it has only one nucleophilic site. |
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| 34. |
Which one of the following behaves both as a nucleophile and an electrophile ?A. `CH_(3)-C-=N`B. `CH_(3)OH`C. `CH_(2)=CH-CH_(3)`D. `CH_(3)NH_(2)` |
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Answer» Correct Answer - A `R-overset(delta +)(C) equiv overset(delta-)(N)`: has electrophilic C-atom and nucleophilic N-atom. |
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| 35. |
Assertion (A) : At isoelectric point, the amino acid does not migrate under the influence of electrical field. Reason (R) : The amino acid molecule at the isoelectric point exerts as zwitter ion structure.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 | |
| 36. |
The electrolytic reduction of nitrobenzene in strongly acidic medium produces .A. AzoxybenzeneB. AnilineC. PhenylhydroxylamineD. `p-`Aminopheneol |
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Answer» Correct Answer - D See reduction of nitrobenzene in the Comprehensive Review. |
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| 37. |
The `pK_(a) " pK_(b)` values of some bases are as follows. Which is strongest base ?A. `pK_(b) = 9.4`B. `pK_(b) = 3.32`C. `pK_(a) = 4.0`D. `pK_(a) = 11.1` |
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Answer» Correct Answer - B Smaller is the `pK_(b)`, more stronger the base and smaller is the `pK_(a)`, more stronger is the acid. |
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| 38. |
Cyanides and isocyanides are isomers of the typeA. PositionalB. FunctionalC. TautomerD. All the three |
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Answer» Correct Answer - B See introduction of cyanides. |
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| 39. |
`R - N overset(rarr)(=) C + HgO rarr X + Hg_(2)O, X` isA. `1^(@)` AminesB. `2^(@)` AminesC. Alkyl cyanateD. Alkyl isocyanate. |
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Answer» Correct Answer - D `RN overset(rarr)(=) C+2HgO rarr underset("Alkyl isocyanate")(R-N=C=O)+Hg_(2)O` |
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| 40. |
Which of the following statement is correct ?A. Methylamine is slightly acidicB. Methylamine is less basic than ammoniaC. Methylamine is less basic than dimethyl amineD. Methyl amine is less basic than Aniline |
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Answer» Correct Answer - C `2^(@)` Amines are more basic than `1^(@)` amines. |
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| 41. |
Reaction of aniline with benzaldehyde isA. SubstitutionB. AdditionC. CondensationD. Polymerisation |
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Answer» Correct Answer - C `underset("Benzaldehyde")(C_(6)H_(5)CH=O) + underset("Aniline")(H_(2)NC_(6)H_(5)) overset("Condensation")(rarr) underset("Benzylideneaniline")(C_(6)H_(5)CH=NC_(6)H_(5))+H_(2)O` |
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| 42. |
In labosratory, benzene diazonium chloride is not isolated in the crystalline solid state since in solid state itA. is readily oxidisedB. explodesC. is readily reducedD. is polymerised |
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Answer» Correct Answer - B See properties of diazonium salt. |
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| 43. |
Which of the following is not a nitroderivative ?A. `C_(6)H_(5)NO_(2)`C. `CH_(3) - underset(O)underset(darr)(N) = O`D. `CH_(3)CH_(2)ONO` |
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Answer» Correct Answer - D `CH_(3)CH_(2)ONO` is ethyl nitrile. |
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| 44. |
Which of the following is not a nitroderivative ?A. `C_(6)H_(5)NO_(2)`B. `CH_(3)CH_(2)ONO`C. D. `C_(6)H_(4)(OH)NO_(2)` |
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Answer» Correct Answer - B `H_(3)C-CH_(2)-O-N=O`. This is nitrite derivative. |
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| 45. |
Among the following compounds, most basic isA. AnilineB. AcetanilideC. p-nitroD. Benzylamine. |
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Answer» Correct Answer - D Acetanilide is an amide and hence it is a much weaker base than aniline. Further since electron withdrawing substituents decrease the basicity of amines, therefore p-notro aniline is a weaker base than aniline. Benzylamine is aralkylamine and hence a much stronger base than aniline. Thus benzylamine is the strongest base. |
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| 46. |
The strongest base isA. N, N-diethyl ethanamineB. N-ethyl ethanamineC. N-methyl methylamineD. Phenyl methyl amine. |
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Answer» Correct Answer - B `2^(@)` Amines are stronger bases than `1^(@)` amines followed by `3^(@)` amines. Further, among `2^(@)` amines, `(C_(2)H_(5))_(2)NH` is more basic than `(CH_(3))_(2)NH` due to stronger + Z-effect of the `CH_(3)CH_(2)` over `CH_(3)` grow. The option (B) is correct. |
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| 47. |
Ethyl nitrite on reduction with Sn/HCI gives:A. Ethanol, hydroxylamineB. Ethanol, hydrochloride, ammonium hydroxideC. Ethanal, `NH_(2)OH`D. `C_(2)H_(5)OH, H_(2)O` |
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Answer» Correct Answer - A `CH_(2)H_(5)-O-N=O underset([H])overset(Sn//HCl)(rarr) C_(2)H_(5)OH+NH_(2)OH+HCl` |
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| 48. |
Which one of the following is least basic ?A. AnilineB. DiethylamineC. `p-`sulphanilic acidD. `o-`nitroaniline |
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Answer» Correct Answer - D o-Nitroaniline is least basic. Therefore, the order of basic strength is o-nitroaniline `lt` aniline `lt` p-sulphanilic acid `lt` diethyl amine. |
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| 49. |
Which of the following is the least basic amine ?A. Ethyl amineB. Diethyl amineC. AnilineD. Benzyl amine |
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Answer» Correct Answer - C Basicity of amines is due to the availability of electron density on N atom for protonation. Presence of alkyl group In alkyl amines increases the electron density on N-atom by virtue of +I effect. However, aniline is less basic as phenyl group exerts -I effect, i.e., it withdraws electron resulting i lower avaliability of electron on nitrogen for protonation. |
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| 50. |
Acetooxime on reduction with `LiAIH_(4)` producesA. `1-`PropanamineB. `2-`PropanamineC. EthanamineD. Ethane nitrile |
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Answer» Correct Answer - A `underset("Acetoxime")((CH_(3))_(2)CH=NOH) overset(LiAlH_(4))(rarr) underset((1^(@)" Amine"))underset("1-Propanamine")((CH_(3))_(2)CH-NH_(2))` |
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