Amines PYQs Set 1 (PDF)

Set 1 of 10 · Questions 1-30 of 273

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions NEET Chemistry · Amines · Set 1 (Q1-30)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
1. $Which of the following reactions does not yield an amine?$ (1) $R - X + NH_{3} ⟶$ (2) $R - CH = NOH + [H] \to Na C_{2} H_{5} OH$ (3) $R - CN + H_{2} O \to H^{+}$ (4) $R - CONH_{2} + [H] \to LiAlH_{4}$ 2. $Which one among the following statements is true?$ (1) $Aliphatic diazonium salts are stable.$ (2) $Aniline cannot be converted into phenol via its diazonium salt.$ (3) $Aliphatic diazonium salts liberate nitrogen gas quantitatively.$ (4) $Aniline cannot be converted into fluorobenzene via its diazonium salt$ 3. $Which of the following will be the most stable diazonium salt (R N_{2}^{+} X^{-}) ?$ (1) $CH_{3} N_{2}^{+} X^{-}$ (2) $C_{6} H_{5} N_{2}^{+} X^{-}$ (3) $CH_{3} CH_{2} N_{2}^{+} X^{-}$ (4) $C_{6} H_{5} CH_{2} N_{2}^{+} X^{-}$ 4. $Which of the following amine cannot be prepared by the Gabriel phthalimide synthesis method?$ (1) $Ethylamine$ (2) $Benzylamine$ (3) $Phenylamine$ (4) $Propylamine$ 5. $Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is____. Aniline, N-Methylaniline, Methanamine, N, N-Dimethylmethanamine, N-Methyl methanamine, Phenylmethanamine, N-propylaniline, N-phenylaniline, N, N-Dimethylaniline, Allyl amine, Isopropyl amine$ (1) $2$ (2) $5$ (3) $4$ (4) $8$ 6. $Hoffmann's bromamide reaction is to convert$ (1) $acid to alcohol$ (2) $alcohol to acid$ (3) $amide to amine$ (4) $amine to amide.$ 7. $Which of the following is least soluble in water at 298 K ?$ (1) $. CH_{3} NH_{2}$ (2) $(CH_{3})_{3} N$ (3) $(CH_{3})_{2} NH$ (4) $C_{6} H_{5} NH_{2}$ 8. $Arrange the following in the order of decreasing basicity RN = CHR^{1} RC \equiv N RNH_{2} I II III$ (1) $I > III > II$ (2) $III > I > II$ (3) $II > III > I$ (4) $II > I > III$ 9. $Consider the nitration of benzene using mixed conc. H_{2} SO_{4} and HNO_{3} . If a large amount of KHSO_{4} is added to the mixture, the rate of nitration will be [NEET 2016]$ (1) $slower$ (2) $unchanged$ (3) $doubled$ (4) $faster$ 10. $In the following compounds, the decreasing order of basic strength will be :$ (1) $C_{2} H_{5} N H_{2} > N H_{3} > (C_{2} H_{5})_{2} NH$ (2) $(C_{2} H_{5})_{2} NH > N H_{3} > C_{2} H_{5} N H_{2}$ (3) $(C_{2} H_{5})_{2} NH > C_{2} H_{5} N H_{2} > N H_{3}$ (4) $N H_{3} > C_{2} H_{5} N H_{2} > (C_{2} H_{5})_{2} NH$ 11. $The amine which reacts with p -toluenesulphonyl chloride to give a clear solution which on acidification gives insoluble compound is$ (1) $C_{2} H_{5} NH_{2}$ (2) $(C_{2} H_{5})_{2} NH$ (3) $(C_{2} H_{5})_{3} N$ (4) $CH_{3} NHC_{2} H_{5}$ 12. $Arrange the following in increasing order of their boiling points N-Ethylethanamine Butanamine N, N-dimethyl ethanamine I II III$ (1) $III > II > I$ (2) $III > I > II$ (3) $II > III > I$ (4) $II > I > III$ 13. $A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. The % yield of this reaction is:-$ (1) $59.5 %$ (2) $72.5 %$ (3) $97.5 %$ (4) $81.5 %$ 14. $Which of the following has the lowest boiling point?$ (1) $CH_{3} - CH_{2} - NH_{2}$ (2) $CH_{3} - O - CH_{3}$ (3) $HCOOH$ (4) $CH_{3} CH_{2} OH$ 15. $An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be a$ (1) $tertiary amine$ (2) $a secondary amine$ (3) $a primary amine$ (4) $a mixture of all the three.$ 16. $Which of the following would undergo Hoffmann reaction to give a primary amine?$ (1) $R - C (= O) - C l$ (2) $RCONH_{2}$ (3) $RCONHCH_{3}$ (4) $R COOR$ 17. $The amine ' A' when treated with nitrous acid gives yellow oily substance. The amine A is$ (1) $triethylamine$ (2) $trimethylamine$ (3) $aniline$ (4) $methylphenylamine.$ 18. $The increasing basicity order of the following compounds is: (A) C H_{3} C H_{2} N H_{2} (B) C H_{2} C H_{3} \| C H_{3} C H_{2} NH (C) C H_{3} \| H_{3} C - N - CH_{3} (D) C H_{3} \| Ph - N - H$ (1) $(D) < (C) < (B) < (A)$ (2) $(D) < (C) < (A) < (B)$ (3) $(A) < (B) < (C) < (D)$ (4) $(A) < (B) < (D) < (C)$ 19. $Which of the following reactions are used in the preparation of aliphatic primary amines? I. Gabriel-phthalimide reaction II. Hoffmann Bromamide reaction III. Carbylamine reaction IV. Sandmayer reaction$ (1) $II & III only$ (2) $I & II only$ (3) $III & IV only$ (4) $I & IV only$ 20. $Diethylamine when treated with nitrous acid yields$ (1) $diethylammonium nitrite$ (2) $ethyl alcohol$ (3) $N-nitrosodiethylamine$ (4) $triethylammonium nitrite.$ 21. $Tertiary amines with Hinsberg's reagent give$ (1) $no reaction$ (2) $products which are same as that of 1^{\circ} amine$ (3) $products which are same as that of 2^{\circ} amine$ (4) $products which are a quaternary salt.$ 22. $If aniline is treated with 1 : 1 mixture of conc. HNO_{3} and conc. H_{2} SO_{4}, p-nitroaniline and m -nitroaniline are formed nearly in equal amounts. This is due to$ (1) $m-directing property of - NH_{2} group$ (2) $protonation of - NH_{2} which causes deactivation of benzene ring$ (3) $m - and p-directing property of - NH_{2} group$ (4) $isomerization of some p-nitroaniline into m -nitroaniline.$ 23. $Given below arc two statements : Statement I : Pure Aniline and other arylamines are usually colourless. Statement II : Arylamines get coloured on storage due to atmospheric reduction. choose the most appropriate answer from the options given below:$ (1) $Both Statement I and Statement II are incorrect$ (2) $Both Statement I and Statement II are correct$ (3) $Statement I is correct but Statement II is incorrect$ (4) $Statement I is incorrect but Statement II is correct$ 24. $Which of the following statement is incorrect in case of Hofmann bromamide degradation?$ (1) $Reaction is useful for decreasing length of carbon chain by one carbon atom.$ (2) $It gives tertiary amine.$ (3) $It gives primary amine.$ (4) $Aqueous or alcoholic KOH is used with bromine.$ 25. $During halogen test, sodium fusion extract is boiled with concentrated H N O_{3} to$ (1) $remove unreacted sodium$ (2) $decompose cyanide or sulphide of sodium$ (3) $extract halogen from organic compound$ (4) $maintain the pH of extract$ 26. $The most appropriate reagent for conversion of C_{2} H_{5} CN into CH_{3} CH_{2} CH_{2} NH_{2} is$ (1) $NaBH_{4}$ (2) $CaH_{2}$ (3) $Na (CN) BH_{3}$ (4) $LiAlH_{4}$ 27. $The correct order in aqueous medium of basic strength in case of methyl substituted amines is :$ (1) $M e_{2} NH > M e N H_{2} > M e_{3} N > N H_{3}$ (2) $M e_{2} NH > M e_{3} N > M e N H_{2} > N H_{3}$ (3) $N H_{3} > M e_{3} N > M e N H_{2} > M e_{2} NH$ (4) $M e_{3} N > M e_{2} NH > M e N H_{2} > N H_{3}$ 28. $The correct order of increasing basic nature for the bases NH_{3}, CH_{3} NH_{2} and (CH_{3})_{2} NH in aqueous solutions$ (1) $CH_{3} NH_{2} < NH_{3} < (CH_{3})_{2} NH$ (2) $CH_{3} NH_{2} < (CH_{3})_{2} NH < NH_{3}$ (3) $(CH_{3})_{2} NH < NH_{3} < CH_{3} NH_{2}$ (4) $NH_{3} < CH_{3} NH_{2} < (CH_{3})_{2} NH$ 29. $Nitroalkanes are obtained in laboratory from primary or secondary alkyl halides by the action$ (1) $AgNO_{2}$ (2) $NaNO_{3}$ (3) $AgNO_{3}$ (4) $HNO_{3}$ 30. $Which among the following reagents is used to distinguish primary, secondary and tertiary amines according to solubility in alkaline medium?$ (1) $Benzenesulphonyl chloride$ (2) $Iodoform$ (3) $Ethylene glycol$ (4) $Acetyl chloride$