JEE Chemistry Amines MCQs Set 13

Multiple Choice Questions (MCQs) for JEE Chemistry: Amines

Access targeted multiple-choice questions for Amines designed to align with the latest JEE academic syllabus for JEE Chemistry. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Practice Amines MCQs for JEE Chemistry

View or download the dedicated Amines MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Chemistry evaluations.

Multiple Choice Questions

Question 1: In acid medium nitrobenzene is reduced to aniline: C6H5NO2 + 6[H] → C6H5NH2 + 2H2O. The reducing agent used is
(a) LiAlH4
(b) Sn/HCl
(c) Na/alcohol
(d) H2/Ni
Show Answer & Explanation

Answer: (b) Sn/HCl

Explanation:
1. Tin and hydrochloric acid supply nascent hydrogen in acidic medium.
2. LiAlH4 gives azobenzene with nitroarenes.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 2: When aniline is treated with sodium nitrite and hydrochloric acid at 0°C, it gives
(a) phenol and N2
(b) a diazonium salt
(c) a hydrazo compound
(d) no reaction takes place
Show Answer & Explanation

Answer: (b) a diazonium salt

Explanation:
1. Cold diazotisation gives benzenediazonium chloride.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 3: CH3NO2 → (Sn + HCl) CH3X. The group X contains
(a) -NH2
(b) -COOH
(c) -CHO
(d) (CH3CO)2O
Show Answer & Explanation

Answer: (a) -NH2

Explanation:
1. Nitro compounds are reduced to amines, so CH3NH2 is formed.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 4: Aromatic nitriles (ArCN) are not made by the reaction
(a) ArX + KCN
(b) ArN2+ + CuCN
(c) ArCONH2 + P2O5
(d) ArCONH2 + SOCl2
Show Answer & Explanation

Answer: (a) ArX + KCN

Explanation:
1. The C-X bond in an aryl halide has partial double-bond character and is not displaced by cyanide under ordinary conditions.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 5: An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitrosoamine. The compound is
(a) CH3NH2
(b) CH3CH2NH2
(c) CH3CH2NHCH2CH3
(d) (CH3CH2)3N
Show Answer & Explanation

Answer: (c) CH3CH2NHCH2CH3

Explanation:
1. Secondary amines give N-nitrosoamines, yellow oily liquids.
2. Primary amines give N2 and tertiary amines give only salts.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 6: Azo dyes are prepared from
(a) aniline
(b) salicylic acid
(c) benzaldehyde
(d) chlorobenzene
Show Answer & Explanation

Answer: (a) aniline

Explanation:
1. A diazonium salt (from aniline) couples with phenols or amines to give azo dyes.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 7: Gabriel's phthalimide synthesis is used for the preparation of
(a) primary aromatic amines
(b) primary aliphatic amines
(c) secondary amines
(d) tertiary amines
Show Answer & Explanation

Answer: (b) primary aliphatic amines

Explanation:
1. Potassium phthalimide reacts with alkyl halides and hydrolysis releases RNH2.
2. Aryl halides do not react, so aromatic amines cannot be made this way.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 8: For the preparation of p-nitroiodobenzene from p-nitroaniline, the best method is
(a) NaNO2/HCl followed by KI
(b) NaNO2/HCl followed by CuCN
(c) LiAlH4 followed by I2
(d) NaBH4 followed by I2
Show Answer & Explanation

Answer: (a) NaNO2/HCl followed by KI

Explanation:
1. Diazotise the amine and treat the diazonium salt with KI.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 9: KCN reacts readily to give a cyanide with
(a) ethyl alcohol
(b) ethyl bromide
(c) bromobenzene
(d) chlorobenzene
Show Answer & Explanation

Answer: (b) ethyl bromide

Explanation:
1. Primary alkyl halides undergo substitution with CN-.
2. Alcohols and aryl halides do not.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 10: Which of the following amines will not react with nitrous acid to give nitrogen?
(a) CH3NH2
(b) CH3CH2NH2
(c) CH3CH(NH2)CH3
(d) (CH3)3N
Show Answer & Explanation

Answer: (d) (CH3)3N

Explanation:
1. Primary aliphatic amines evolve nitrogen.
2. A tertiary amine has no N-H and only forms a salt.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 11: Which of the following compounds is expected to be most basic?
(a) aniline
(b) methylamine
(c) hydroxylamine
(d) ethylamine
Show Answer & Explanation

Answer: (d) ethylamine

Explanation:
1. Alkyl groups donate electrons, and ethyl is a slightly better donor than methyl.
2. Aniline and hydroxylamine are less basic.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 12: Which of the following compounds is an amino acid?
(a) CH3CH2COONH4
(b) CH3CH(NH2)COOH
(c) CH3CH2CONH2
(d) CH3CH(NH2)CONH2 (an amide)
Show Answer & Explanation

Answer: (b) CH3CH(NH2)COOH

Explanation:
1. An amino acid has an amino group and a carboxyl group on the same molecule.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 13: The nitro group in nitrobenzene is a
(a) ortho director
(b) meta director
(c) para director
(d) ortho and para director
Show Answer & Explanation

Answer: (b) meta director

Explanation:
1. -NO2 withdraws electrons by -I and -M effects and directs further substitution to the meta position.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 14: Alkyl cyanides are
(a) acidic
(b) basic
(c) neutral
(d) amphoteric
Show Answer & Explanation

Answer: (c) neutral

Explanation:
1. They do not ionise appreciably in water and do not turn litmus.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 15: The alkyl cyanides, when hydrolysed to the corresponding acid, evolve the gas
(a) N2
(b) O2
(c) NH3
(d) CO2
Show Answer & Explanation

Answer: (c) NH3

Explanation:
1. RCN + 2H2O → RCOOH + NH3.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 16: Aniline, when treated with HNO2 and HCl at 0°C, gives
(a) phenol
(b) nitrobenzene
(c) a diazo compound
(d) none of these
Show Answer & Explanation

Answer: (c) a diazo compound

Explanation:
1. At 0-5°C the product is the diazonium salt (the diazo compound).

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 17: An alkyl cyanide reacts with a Grignard reagent and, after hydrolysis, gives
(a) an aldehyde
(b) a ketone
(c) an alcohol
(d) an acid
Show Answer & Explanation

Answer: (b) a ketone

Explanation:
1. RCN + R'MgX → R(R')C=NMgX, which hydrolyses to the ketone RCOR'.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 18: The product formed by benzene and fuming nitric acid with conc. sulphuric acid on heating is
(a) m-dinitrobenzene
(b) nitrobenzene
(c) sym-trinitrobenzene
(d) none of these
Show Answer & Explanation

Answer: (a) m-dinitrobenzene

Explanation:
1. The first nitro group is meta-directing, so the second enters at the meta position.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 19: Which of the following amines will undergo diazotisation?
(a) primary aliphatic amines
(b) primary aromatic amines
(c) both (a) and (b)
(d) none of the above
Show Answer & Explanation

Answer: (b) primary aromatic amines

Explanation:
1. Only aryl diazonium salts are stable enough at 0-5°C to be isolated in solution.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 20: Reaction of primary amines with aldehydes yields
(a) amides
(b) aldimines (Schiff bases)
(c) nitriles
(d) nitro compounds
Show Answer & Explanation

Answer: (b) aldimines (Schiff bases)

Explanation:
1. RNH2 + R'CHO → R'CH=NR + H2O.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 21: When acetamide is treated with HNO2, the gas evolved is
(a) H2
(b) O2
(c) N2
(d) CH4
Show Answer & Explanation

Answer: (c) N2

Explanation:
1. CH3CONH2 + HNO2 → CH3COOH + N2 + H2O.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 22: Nitrobenzene on nitration gives
(a) o-dinitrobenzene
(b) p-dinitrobenzene
(c) m-dinitrobenzene
(d) o- and p-nitrobenzene
Show Answer & Explanation

Answer: (c) m-dinitrobenzene

Explanation:
1. The nitro group is meta-directing.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 23: Reduction of alkyl nitrites yields
(a) alcohol
(b) base
(c) amine
(d) acid
Show Answer & Explanation

Answer: (a) alcohol

Explanation:
1. The C-O bond is retained, so RONO is reduced to ROH (with ammonia or hydroxylamine).

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

Question 24: When primary amines are treated with HCl, the product obtained is
(a) an alcohol
(b) a cyanide
(c) an amide
(d) an ammonium salt
Show Answer & Explanation

Answer: (d) an ammonium salt

Explanation:
1. The amine accepts a proton to give RNH3+Cl-.

Teacher's Note:
1. Eliminate options by checking functional groups on both sides of the reaction.
2. Only one option will have the correct functional group and carbon skeleton.

Question 25: Which one is the weakest base?
(a) ammonia
(b) methylamine
(c) dimethylamine
(d) trimethylamine
Show Answer & Explanation

Answer: (a) ammonia

Explanation:
1. In water, pKb values are about 4.75 (ammonia), 3.4 (methylamine), 3.3 (dimethylamine) and 4.2 (trimethylamine).
2. Ammonia is the weakest.

Teacher's Note:
1. Revise the physical properties such as hydrogen bonding and boiling points together with the chemistry.
2. Compare similar compounds in pairs when you are asked to rank them.

Question 26: When chloroform is heated with aniline and alcoholic KOH, it gives
(a) phenyl cyanide
(b) phenyl isocyanide
(c) chlorobenzene
(d) phenol
Show Answer & Explanation

Answer: (b) phenyl isocyanide

Explanation:
1. Carbylamine reaction of aniline gives C6H5NC.

Teacher's Note:
1. Learn the reactivity order of acid derivatives: acyl chloride, anhydride, ester, amide.
2. Most questions of this type are solved by recalling the standard reagent and product pair.

Question 27: Which of the following does not react with HNO2?
(a) primary nitroalkanes
(b) secondary nitroalkanes
(c) tertiary nitroalkanes
(d) all of these
Show Answer & Explanation

Answer: (c) tertiary nitroalkanes

Explanation:
1. Reaction needs an alpha hydrogen on the carbon bearing the nitro group.
2. Tertiary nitroalkanes have none.

Teacher's Note:
1. Always link acid strength to the stability of the carboxylate ion.
2. Electron-withdrawing groups increase acidity and electron-donating groups decrease it.

Question 28: Primary amines can be distinguished from secondary and tertiary amines by reacting with
(a) chloroform and alcoholic KOH
(b) methyl iodide
(c) chloroform alone
(d) zinc dust
Show Answer & Explanation

Answer: (a) chloroform and alcoholic KOH

Explanation:
1. Only primary amines give the carbylamine (isocyanide) test.

Teacher's Note:
1. Note the name reaction and write its equation once in your notebook.
2. Such one-step recall questions are common in the JEE and NEET style papers.

Question 29: Which of the following is not a usual method for preparation of a primary amine?
(a) Hofmann's method
(b) Curtius reaction
(c) Schmidt reaction
(d) Friedel-Crafts reaction
Show Answer & Explanation

Answer: (d) Friedel-Crafts reaction

Explanation:
1. Friedel-Crafts reaction forms C-C bonds on aromatic rings.
2. The others are degradations (Hofmann, Curtius, Schmidt) that give amines.

Teacher's Note:
1. Count carbons before and after the reaction to avoid mistakes in chain-length changes.
2. Check whether the reagent is a reducing, oxidising or dehydrating agent before choosing the product.

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