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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 will give carbylamine test?A. `CH_3NH_2`B. `CH_3NHCH_3`C. `CH_3N(CH_3)CH_3`D. `CH_3CONH_2` |
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Answer» Correct Answer - A Only primary amines will give carbylamine test. `CH_3NH_2+CHCl_3+3KOHtoCH_3NtoC+3KCl+3H_2O` |
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| 2. |
Why do `2^@` and `3^@` amines fails to undergo the carbylamine test?A. They combine with chloroform to give a stable compoundB. They react with alcoholic KOHC. The nitrogen atom of the amine group does not have the required number of hydrogen atomsD. All the given reasons are correct |
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Answer» Correct Answer - B Secondary and tertiary amines fails to undergo the carbylamine test because they react with alcoholic KOH. `underset(1^@ "amine")(R-NH_2)+CHCl_3 + 3KOH overset"Heat"to R-NC + 3KCl + 3H_2O` |
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| 3. |
Ethyl isocyanide on hydrolysis in acidic medium generates:A. Ethanoic acid and ammonium saltB. Methylamine salt and ethanoic acidC. Ethylamine salt and methanoic acidD. Propanoice acid and ammonium salt |
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Answer» Correct Answer - C `C_2H_5NC+H_2Ooverset(H^(+))toC_2H_5NH_3^(+)+HCOOH` |
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| 4. |
Ethyl isocyanide on hydrolysis in acidic medium generates:A. ethylamine salt and methanoic acidB. propanoic acid and ammonium saltC. ethanoic acid and ammonium saltD. methylamine salt and ethanoic acid |
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Answer» Correct Answer - A `C_2H_5NC+H_2O overset(H^+)to underset"Methanoic acid ""HCOOH" + C_2H_5NH_2` `C_2H_5NH_2 + H^(+) to underset"Salt"(C_2H_5NH_3^(-))` |
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| 5. |
A positive carbylamine test is given by:A. N.N-dimethylanilineB. 2,4-dimethylanilineC. N-methyl-o-methylanilineD. p-methylbenzylamine |
| Answer» Correct Answer - B | |
| 6. |
A positive carbylamine test is given by:A. N,N-dimethylanilineB. N,methylanilineC. triethylamineD. p-methylbenzylamine |
| Answer» Correct Answer - D | |
| 7. |
Ethyl isocyanide on reduction with sodium and alcohol gives:A. ethylamineB. propylamineC. dimethylamineD. ethyl methylamine |
| Answer» Correct Answer - D | |
| 8. |
`(A) overset(H_(2)//Pt)to1^(@)"Amine"` `(B) overset(H_(2)//Pt)to2^(@)"Amine"` A and B respectively are:A. `RNC,RNC`B. RCN,RCNC. RCN,RNCD. RNC,RCN |
| Answer» Correct Answer - C | |
| 9. |
In carbylamine reaction:A. the nucleophilic is `RNH_(2)` and electrophilie is `C Cl_(2)`B. the nucleophilic is primary amine and electrophile is `C Cl_(3)^(-)`C. the nucleophilic is `C Cl_(3)^(-)` and the electrophile is primary amineD. the attracting reagent is electrophile |
| Answer» Correct Answer - A | |
| 10. |
Which of the following products is obtained when methyl isocyanide reacts with chlorine?A. `CH_(3)N=C Cl_(2)`B. `CH_(3)NCl-C Cl_(2)`C. `CICH_(2)NC`D. `Cl_(2)CHNC` |
| Answer» Correct Answer - A | |
| 11. |
Acetaldoxirne reacts with phosphorus pentoxide to give:A. Methyl cyanideB. methyl cyanateC. ethyl cyanideD. none of these |
| Answer» Correct Answer - A | |
| 12. |
Aniline and methyl amine can be differentiated byA. Reaction with chlorofrm and aqueous solution of `KOH`B. Diazotisation followed by coupling with phenolC. reaction with `HNO_2`D. None of these |
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Answer» Correct Answer - B Phenol react with aniline to give diazonium salt by coupling but Methyl amine not react with phenol. |
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| 13. |
An optically active compound (A) decolourises `Br_(2)//C Cl_(4)` and releases `N_(2)` with nitrous acid. The compound A is:A. B. C. D. |
| Answer» Correct Answer - A | |
| 14. |
Which one of the following will not react with the Grignard reagent `(C_(2)H_(5)MgBr)`A. `C_(2)H_(5)-NH_(2)`B. C. `C_(2)H_(5)-underset(C_(2)H_(5))underset(|)overset(C_(2)H_(5))overset(|)(N)`D. `CH_(3)-overset(O)overset(||)(C)-NH_(2)` |
| Answer» Correct Answer - C | |
| 15. |
Which of the following reagents can be used to prepare ethyl carbylarnine from ethyl iodide?A. KCNB. AgCNC. CuCND. HCN |
| Answer» Correct Answer - B | |
| 16. |
One mole of an amine (A) consumes two moles of methyl bromide to give a quaternary ammonoium salt. The amine (A) is:A. `(CH_(3))_(3)C CH_(2)NH_(2)`B. `(CH_(3))_(2)NCH_(2)CH_(3)`C. D. |
| Answer» Correct Answer - C | |
| 17. |
When methyl iodide is treated with ammonia, the product obtained is/are:A. methylamineB. dimethylamineC. trimethylamineD. quaternary ammonium salt. |
| Answer» Correct Answer - A::B::C::D | |
| 18. |
Benzamide and benzyl amine can be distinguished byA. cold dil. `NaOH`B. cold dil. `HCl`C. both a and bD. `NaNO_2`,`HCl`,`0^@C` Then `beta`-naphthol |
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Answer» Correct Answer - B Cold dil.NaOH does attact to either of the compound while cold dil. HCl reacts only with benzyl amine `C_6H_5CH_2NH_2`. |
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| 19. |
Write chemical equations for the following reactions : Ammonolysis of benzyl chloride and reaction of amine so formed with two moles of `CH_(3)Cl`. |
| Answer» `underset("Benzyl chloride")(C_(6)H_(5)-CH_(2)-Cl) overset(NH_(3))(to) underset("Benzyl amine")(C_(6)H_(5)-CH_(2)NH_(2)) overset(2CH_(3)Cl)(to) underset("N, N-Dimethylphenylmethanamine")(C_(6)H_(5)-CH_(2)-underset(CH_(3))(N)-CH_(3))` | |
| 20. |
The product oblaincd in the following reaction is:A. `CH_(3)CH_(2)CH_(2)COOH`B. `CH_(3)CH_(2)CH_(2)-overset(OH)overset(|)(C)=NH`C. `CH_(3)CH_(2)CH_(2)-CN`D. none of the above |
| Answer» Correct Answer - C | |
| 21. |
Write the product formed when benzyl chloride is reacted with ammonia followed by treatment with methyl and ethyl chlorides. Write the product |
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Answer» a) Benzyl chloride reacts with ammonia to form benzyl amine followed by the reaction with methyl chloride forms N, N - Dimethyl phenyl methanamine `underset("Benzyl chloride")(C_(6)H_(5)-CH_(2)-Cl) overset(NH_(3)) to underset("Benzyl amine")(C_(6)H_(5)-CH_(2)NH_(2)) overset(2CH_(3)Cl) to underset("Phenyl methanamine") underset("N, N-Dimethl")(C_(6)H_(5)-CH_(2) - underset(CH_(3)) underset(|)(N)-CH_(3))` b) Benzyl chloride reacts with ammonia to form benzyl amine followed by the reaction with Ethyl choride form `{:(C_(6)H_(5)-CH_(2)-Cl overset(NH_(3))to C_(6)H_(5)-CH_(2)-NH_(2) overset(2C_(2)H_(5)Cl)toC_(6)H_(5)-CH_(2)-N-CH_(2)-CH_(3)),(" "|),(" "CH_(2)-CH_(3)),(" N,N-Di Ethyl phenyl methanamine"):}` |
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| 22. |
Treatment of ammonia with excess of ethyl chloride will yieldA. diethylamineB. methylamineC. tetraethyl ammonium chlorideD. ethane |
| Answer» Correct Answer - C | |
| 23. |
Which nitrogen is protonated readily in the guanidine? A. 1B. 2C. 3D. all of these |
| Answer» Correct Answer - A | |
| 24. |
Which of the following is insoluble in dil.HClA. AnilineB. TriphenylamineC. ethylamineD. Dimethylamine |
| Answer» Correct Answer - B | |
| 25. |
Which of the following has the highest `pK_(b)` value?A. B. C. D. |
| Answer» Correct Answer - A | |
| 26. |
Which has the highest `pK_(b)` value?A. `R_(3)C-NH_(2)`B. `R_(2)NH`C. `RNH_(2)`D. `NH_(3)` |
| Answer» Correct Answer - D | |
| 27. |
Among the following amines. which one has the highest `pK_(b)`, value in aqueous solution?A. MethanamineB. EthanamineC. N.N-DiethylethanamineD. Benzeneamine |
| Answer» Correct Answer - D | |
| 28. |
Organic compound containing carbon, hydrogen and nitrogen, can be either amine or nitrate. How many amine isomers are possible with molecular formula `C_(4)H_(11)N`?A. 4B. 6C. 7D. 8 |
| Answer» Correct Answer - D | |
| 29. |
Butanenitrile may be prepared by heatingA. propyl alcohol+KCNB. butyl alcohol+KCNC. butyl chloride+KCND. propyl chloride+KCN |
| Answer» Correct Answer - D | |
| 30. |
In the given reaction, `NH_3+RX to underset((1^@))(R NH_2)+RX to underset((2^@))(R_2 NH)+RX to underset((3^@))(R_3N) + RX to R_4 N^(o+)X^-` Select an appropriate statement(s) about the reaction.A. In this reaction `NH_3` is the nucleophileB. In this reaction RX is the nucleophileC. `R_4N^(o+)X^(-)` is called as quarternary ammonium saltD. Both (a) and,(c) |
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Answer» Correct Answer - D Primary amine obtained behaves as a nucleophile and can further react with alkyl halide to form secondary and tertiary amines and finally quaternary ammonium salt. `underset" Nucleophile"ddot(" "NH_3) + R -X to underset"Substituted ammonium salt"(R overset(o+)NH_3X^-)` `underset((1^@))(RNH_2)+RX to underset((2^@))(R_2NH) overset(RX)to underset((3^@))(R_3N) overset(RX)to underset"Quaternary ammonium salt"(R_4N^(o+)X^-)` |
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| 31. |
The correct sequence of reactions to be performed to convert benzene into m-bromoaniline is :A. nitration, reduction,bromominationB. bromination, nitration, reductionC. nitration, bromination,reductionD. reduction,nitration,bromination |
| Answer» Correct Answer - C | |
| 32. |
Consider the following sequence of reaction. `C_6H_5NH_2 underset(HCl)overset(NaNO_2)to X overset(Cu_2(CN)_2) to Y overset(H_2O // H^+)to Z` Z is identified asA. `C_6H_5-NH-CH_3`B. `C_6H_5-COOH`C. `C_6H_5-CH_2-NH_2`D. `C_6H_5-CH_2-COOH` |
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Answer» Correct Answer - B The product Z is identified as `C_6H_5-COOH` |
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| 33. |
In order to distinguigh between ` C_2H_5NH_2` and ` C_6H_5NH_2` which of the following reagenis is useful ?A. Hinsberg reagentB. `beta`-NaphtholC. Benzene diazonium chlorideD. None of the above |
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Answer» Correct Answer - B `1^@` aromatic amine on diazotisation followed by coupling with `beta`- naphthol gives azo due test. |
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| 34. |
Statement I Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide. Statement II Cyanide `(CN^(-))` is a strong nucleoohile.A. If both A and R are correct and R is the correct explanation of A.B. If both A and R are correct and R is not the correct explanation of A.C. If A is the correct but R is incorect.D. If both A and R is incorect. |
| Answer» Correct Answer - D | |
| 35. |
Assertion (A) : Pyridine is more basic than piperidine. Reason (R ): N atom is `sp^2`-hybridised in both.A. If both A and R are correct and R is the correct explanation of A.B. If both A and R are correct and R is not the correct explanation of A.C. If A is the correct but R is incorect.D. If A is the incorrect but R is corect. |
| Answer» Correct Answer - C | |
| 36. |
In gattermann reaction a diazonium group is replaced by X using Y. What are X and Y? `{:(X,,Y),((a) Cl^(-),,Cu//HCl),((b) Cl^(+),,CuCl_(2)//HCl),((C) Cl^(-),,CuCl_(2)//HCl),((d)Cl_(2),,Cu_(2)"O"//HCl):}`A.B.C.D. |
| Answer» Correct Answer - A | |
| 37. |
(A) Amines are more basic than esters and ethers. (R) Nitrogen is less electronegative than oxygen. It is better position to accommodate the positive charge on the proton.A. If both A and R are correct and R is the correct explanation of A.B. If both A and R are correct and R is not the correct explanation of A.C. If A is the correct but R is incorect.D. If A is the incorrect but R is corect. |
| Answer» Correct Answer - A | |
| 38. |
The IUPAC name of `CH_3-undersetunderset(NH_2)|CH-CH_3` isA. dimethylamineB. 2-aminopropaneC. isopropylamineD. 2-propanamine |
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Answer» Correct Answer - D `underset"2-propanamine"(CH_3-oversetoverset(NH_2)|CH-CH_3)` |
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| 39. |
The correct order of increasing boiling points for the bases, `CH_3NH_2, (CH_3)_2NH, (CH_3)_3N` isA. `CH_3NH_2 lt (CH_3)_2NH lt (CH_3)_3N`B. `CH_3NH_2 lt (CH_3)_3N lt (CH_3)_2NH `C. `(CH_3)_3N lt (CH_3)_2NH lt CH_3NH_2`D. `(CH_3)_3N lt CH_3NH_2 lt (CH_3)_2NH` |
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Answer» Correct Answer - C `(CH_3)_3N lt (CH_3)_2NH lt CH_3NH_2` |
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| 40. |
(A) `CuCl_(2)` gives a deep blue coloured solution with ethylamine. (R) Ethylamine molecules co-ordinate with cupric ions forming a blue coloured complex.A. If both A and R are correct and R is the correct explanation of A.B. If both A and R are correct and R is not the correct explanation of A.C. If A is the correct but R is incorect.D. If A is the incorrect but R is corect. |
| Answer» Correct Answer - A | |
| 41. |
The following order of basec character at a,b and c in the following compound isA. `bgtagtc`B. `cgtbgta`C. `agtbgtc`D. `cgtagtb` |
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Answer» Correct Answer - C a is `1^@` amine, b is in `2^@` amine and c is in `3^@` amine. |
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| 42. |
`CH_(3)CH_(2)Cloverset(NaCN)rarrXoverset(Ni//H_(2))rarrYunderset("anhydride")overset(Acetic)rarrZ` `Z` in the above reaction sequence is .A. `CH_(3)CH_(2)CH_(2)NHCOCH_(3)`B. `CH_(3)CH_(2)CH_(2)NH_(3)`C. `CH_(3)CH_(2)CONH_(3)`D. `CH_(3)CH_(2)CH_(2)CONHCOCH_(3)` |
| Answer» Correct Answer - A | |
| 43. |
A colourless odourless and non-combustible gas is liberated when ethylamine reacts with:A. NaOHB. `CH_(3)COCl`C. `NaNO_(2)+HCl`D. `H_(2)SO_(4)` |
| Answer» Correct Answer - C | |
| 44. |
Considering the basec strength of amines in aqueous solution which one has the smallest `pK_b` value?A. `(CH_3)_2NH`B. `CH_3NH_2`C. `(CH_3)_3N`D. `C_6H_5NH_2` |
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Answer» Correct Answer - A Order of basic strength of aliphatic amine in aqueous solution is as follows (order of `K_b`) `(CH_3)_2ddotNH gt CH_3ddotNH_2 gt (CH_3)_3 ddotN gt C_6H_5ddotNH_2` As we know , `pK_b =-log K_b` So, `(CH_3)_2 ddotNH` will have smallest `pK_b` value . In case of phenyl amine, N is attached to `sp^2` -hybridised carbon, hence it has highest `pK_b` value and has least basic strength. |
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| 45. |
The product (D) in the following sequence of reactions is: `CH_(3)COOH overset(NH_(3))to(A) overset("Heat")to(B) overset(P_(2)O_(5))to(C)overset(Na+C_(2)H_(5)OH)to(D)`A. esterB. amineC. acidD. alcohol |
| Answer» Correct Answer - B | |
| 46. |
Considering the basic strength of amines in aqueous sloution which one has the smallest `pk_(b)` value .A. `C_(6)H_(5)NH_(2)`B. `CH_(3)NH_(2)`C. `(CH_(3))_(2)NH`D. `(CH_(3))_(2)N` |
| Answer» Correct Answer - C | |
| 47. |
An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound isA. `CH_3NH_2`B. `CH_3CH_2NH_2`C. `CH_3CH_2NHCH_2CH_3`D. `(CH_3CH_2)_3N` |
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Answer» Correct Answer - C Secondary amine on reaction with aqueous HN02 at low temperature produces yellow oily nitrosoamines. `CH_3CH_2NHCH_2CH_3` is a secondary amine. |
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| 48. |
Three heterocyclic amines are shown below `I=` pyridine, `II=` pyrimindine, `III=` imidazole. What is the orger of increasing? (weaker `lt` stronger base)A. IIB. IC. IIID. ALL OF THESE |
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Answer» Correct Answer - C Pyrimidine`lt`pyridine`lt`Imidazole. |
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| 49. |
Primary amines on oxidation with acidified `KMnO_(4)`, followed by hydrolysis gives:A. aldehydes onlyB. ketones onlyC. aldehydes or ketonesD. carboxylic acids |
| Answer» Correct Answer - C | |
| 50. |
Hydrolysis of `CH_(3)CH_(2)NO_(2)` with 85% `H_(2)SO_(4)` gives:A. `CH_(3)CH_(2)OH`B. `C_(2)H_(6)`C. `CH_(3)CH=NOH`D. `CH_(3)COOH` |
| Answer» Correct Answer - D | |