Amines

CBSE Class 12 Chemistry · every board question from this chapter, 2022–2026 · 2 of them repeated across years

• Which of the following is most basic?2026
• The major product of carbylamine reaction is:2026
• Which of the following reagents are used to prepare primary amines by Hoffmann bromamide degradation reaction? (i) R- O ∥C-NH_2…2026
• Which reagent is used to distinguish between primary, secondary and tertiary amines?2026
• Which of the following reagent is used to distinguish between (C_2 H_5)_2 NH and (C_2 H_5)_3 N?2026
• The correct formula of Hinsberg's reagent is:2026
• The correct order of decreasing basic strength in aqueous solution of the following is:2026
• The correct order of decreasing basic strength of CH_3-NH_2,(CH_3)_2 NH and (CH_3)_3 N in aqueous solution is:2026
• The correct order of decreasing basicities of C_2 H_5 NH_2,(C_2 H_5)_2 NH and (C_2 H_5)_3 N in aqueous solution is:2026
• Which of the following molecules is chiral in nature?2026
• The correct order of decreasing order of pK_b values is:2026
• Which reagent is used to distinguish between C_2 H_5 NH_2 and (C_2 H_5)_2 NH?2026
• Among the following, which one has the lowest value of pK_b?2026
• Identify the compound produced by the reduction of Ethanenitrile with Lithium aluminium hydride:2026
• CH_3-NH_2 on reaction with (CH_3 CO)_2 O gives2026
• Aniline on direct nitration yields2026
• Consider the following compounds: C_2 H_5 NH_2,(C_2 H_5)_2 NH, C_6 H_5 CH_2 NH_2, NH_3, C_6 H_5 NH_2 The correct increasing order…2026
• Which of the following reagent is used to convert benzene diazonium chloride to benzene?2026
• Which of the following amines has lowest pK_b value?2026
• In the reaction of NaOBr with amide, the carbonyl carbon is lost as:2026
• Identify 'X' in the following reaction: 'X' is2026
• Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:2026
• Benzene diazonium chloride on reaction with phenol in weakly basic medium gives2026
• Assertion: Diazonium salts of aromatic amines are more stable than those of aliphatic amines. Reason (R): Diazonium salts of…2026
• Assertion: Diazonium salts of aromatic amines are more stable than those of aliphatic amines. Reason (R): Diazonium salts of…2026
• Assertion: Diazonium salts of aromatic amines are less stable than those of aliphatic amines. Reason (R): Diazonium salts of…2026
• Assertion (A): Aromatic primary amines can easily be prepared by Gabriel phthalimide synthesis. Reason (R): Gabriel phthalimide…2026
• Assertion: Aromatic primary amines cannot be prepared by Gabriel phthalimide synthesis. Reason (R): Gabriel phthalimide synthesis…2026
• Assertion: Aromatic primary amines can be prepared by Gabriel Phthalimide synthesis. Reason (R): Aryl halides do not undergo…2026
• Assertion: Monobromination of aniline can be conveniently done by protecting the amino group by acetylation. Reason (R):…2026
• Complete the following equation: How will you convert nitromethane to methyl isocyanide?2026
• Draw the structures of major products in each of the following reactions:2026
• Write the structures of A, B and C in the following reactions:2026
• How will you obtain the following from benzene diazonium chloride? Write chemical equations involved: 3 []2026
• Give the structures of A, B and C in the following reactions: CH_3-Cl →KCN A →LiAlH_4 B →[Δ]CHCl_3+ alc. KOH C2026
• An organic compound with molecular formula C_3 H_5 N on reaction with C_6 H_5 MgBr followed by hydrolysis, gives a compound.…2026
• How will you obtain the following from aniline? Write the chemical equations involved: Sulphanilic acid 2,4,6-Tribromoaniline…2026
• How will you obtain the following from benzenediazonium chloride? Give chemical equations involved: Chlorobenzene Benzene…2026
• The reaction of amines with mineral acids to form ammonium salts shows that these are basic in nature. Aliphatic amines are…2026
• Like NH_3, nitrogen atom of amine is trivalent and carries an unshared pair of electrons. Nitrogen orbitals in amines are…2026
• Which of the following molecules is chiral in nature?2025
• Hoffmann Bromamide degradation reaction is given by:2025
• The IUPAC name for CH_3-CH_2-N(CH_3)-CH_2-CH_2-CH_3 is:2025
• The reagent that can be used to convert benzenediazonium chloride to benzonitrile is:2025
• In the Hinsberg's method for separation of primary, secondary and tertiary amines, the reagent used is:2025
• The reagent that can be used to convert benzenediazonium chloride to benzene is:2025
• Which is the correct IUPAC name for2025
• The gas evolved when methylamine reacts with HNO_2 is:2025
• Which one of the following amines gives an alcohol on reaction with HNO_2?2025
• The strongest base in aqueous solution among the following amines is:2025
• In the given reaction sequence, the structure of Y would be:2025
• The best reagent for converting propanamide into propanamine is.2025
• When excess of alkyl iodide is treated with ammonia, the product obtained is:2025
• When alkyl iodide is treated with large excess of ammonia, the major product obtained is:2025
• Which is the correct IUPAC name for2025
• Anilinium hydrogen sulphate on heating at 453-473 K produces which of the following as a major product?2025
• Which of the following amines does not give foul smell of isocyanide on heating with chloroform and ethanolic KOH?2025
• An amine 'X' reacts with Hinsberg reagent and the product obtained is soluble in alkali. The amine 'X' is:2025
• An amine 'X' reacts with Hinsberg reagent and the product obtained is insoluble in alkali. The amine 'X' is:2025
• Assertion: Acetanilide is more basic than aniline. Reason (R): Acetylation of aniline results in decrease of electron density on…2025
• Assertion: Boiling point of (CH_3)_3 N is higher than that of CH_3 CH_2 CH_2 NH_2. Reason (R): Hydrogen bonding is more extensive…2025
• Assertion: Boiling point of (C_2 H_5)_2 NH is lower than that of n-C_4 H_9 NH_2. Reason (R): Hydrogen bonding is much more…2025
• Assertion: Boiling point of (C_2 H_5)_2 NH is lower than that of n-C_4 H_9 NH_2. Reason (R): Hydrogen bonding is much more…2025
• Assertion: Aromatic primary amines cannot be prepared by Gabriel Phthalimide synthesis. Reason (R): Aryl halides do not undergo…2025
• Write the structures of the main products of the following reactions:2025
• Identify A and B in each of the following reaction sequence: CH_3 CH_2 Cl →NaCN A →H_2 / Ni B C_6 H_5 NH_2 →[0-5^° C]NaNO_2 / HCl…2025
• Write the structures of the main products of the following reactions:2025
• How can you obtain the following from aniline? Give only chemical equation. p -nitroaniline Chlorobenzene Phenol2025
• How can you obtain the following? Aniline from ammonium benzoate Benzene diazonium chloride from nitrobenzene…2025
• Arrange the following compounds as asked: in increasing order of pK_b values C_2 H_5 NH_2,(C_2 H_5)_2 NH, C_6 H_5 NHCH_3, C_6 H_5…2025
• Arrange the following in decreasing order of pK_b: Aniline, p-nitroaniline, p-methylaniline Account for the following: (i)…2025
• Arrange the following compounds as asked: in decreasing order of pK_b values C_2 H_5 NH_2,(C_2 H_5)_2 NH, C_6 H_5 NHCH_3, C_6 H_5…2025
• Write structure of the products of the following reactions:2025
• Arrange the following compounds in increasing order of their boiling point: (1+2=3) (CH_3)_2 NH, CH_3 CH_2 NH_2, CH_3 CH_2 OH.…2025
• How will you obtain the following from aniline? Give chemical equations only. Sulphanilic acid Phenylisocyanide Acetanilide2025
• Amines have a lone pair of electrons on nitrogen atom due to which they behave as Lewis base. Greater the value of K_b or smaller…2025
• Amines are usually formed from amides, imides, halides, nitro compounds, etc. They exhibit hydrogen bonding which influences…2025
• (i) In a chemistry practical class, the teacher gave his students an amine 'X' having molecular formula C_2 H_7 N, and asked the…2025
• The correct name of the given reaction is Ar-N_2^+ X^- →Cu CN / KCN Ar-CN+N_22024
• Butanenitrile may be prepared by heating:2024
• The correct name of the given reaction is Ar-N_2^+ X^- →[ Cu powder ]HBr Ar-Br+N_2.2024
• Which of the following compounds on treatment with benzene sulphonyl choride forms product insoluble in alkali?2024
• Which of the following compounds will not react with benzene sulphonyl chloride?2024
• Which of the following compounds on treatment with benzene sulphonyl choride forms an alkali-soluble precipitate?2024
• Identify the primary amine from the given options:2024
• Identify the secondary amine from the given options:2024
• Identify the tertiary amine from the following:2024
• Which of the following amines gives carbylamine reaction?2024
• The product (X) obtained in the following reaction is:2024
• The order of increasing basicities of CH_3 NH_2(I),(CH_3)_2 NH(II), (CH_3)_3 N (III) and C_6 H_5 NH_2 (IV) in aqueous media is:2024
• The IUPAC name of is:2024
• Which of the following species can act as the strongest base?2024
• In which of the following molecules, C atom marked with asterisk is chiral?2024
• Aniline on reaction with Bromine water gives:2024
• Assertion: Aliphatic primary amines can be prepared by Gabriel phthalimide synthesis. Reason (R): Alkyl halides undergo…2024
• Assertion: Aniline is a weaker base than cyclohexylamine ( -NH_2 ). Reason (R): Aniline is resonance stabilized.2024
• Assertion: Aromatic primary amines can be prepared by Gabriel phthalimide synthesis. Reason (R): Alkyl halide undergoes…2024
• Assertion: p -nitroaniline is a weaker base than p -toluidine. Reason(R): The electron donating -NO_2 group in p -nitroaniline…2024
• Assertion: Ammonolysis of alkyl halides involves reaction between alkyl halide and ethanolic solution of ammonia. Reason (R):…2024
• Assertion: Diazonium salts of aromatic amines are more stable than those of aliphatic amines. Reason (R): Diazonium salts of…2024
• Assertion: Diazonium salts of aliphatic amines are more stable than those of aromatic amines. Reason (R): Diazonium salts of…2024
• Assertion: Aniline is a stronger base than ammonia. Reason (R): The unshared electron pair on nitrogen atom in aniline becomes…2024
• Assertion: Aniline does not undergo Friedel-Crafts reaction. Reason (R): Friedel-Crafts reaction is a nucleophilic substitution…2024
• Assertion: Aniline does not undergo Friedel-Crafts reaction. Reason (R): Friedel-Crafts reaction is an electrophilic substitution…2024
• Assertion: Aniline undergoes Friedel-Crafts reaction. Reason (R): Aniline forms salt with AlCl_3, the Lewis acid in…2024
• Assertion: Boiling point of butan-1-ol is higher than that of butan-1-amine. Reason (R): Being more polar, butan-1-ol forms…2024
• Assertion: p -nitroaniline is a weaker base than p -toluidine. Reason (R): The electron withdrawing effect of -NO_2 group in p…2024
• Assertion: Acetanilide ( -NHCOCH_3 ) is less basic than aniline. Reason (R): Acetylation of aniline results in decrease of…2024asked 2×
• Carry out the following conversions: (i) Nitrobenzene to Aniline (ii) Aniline to Phenol OR (i) Write a chemical test to…2024
• Draw the structures of major product(s) in each of the following reactions: 1 × 32024
• Write the structures of A, B and C in the following reactions: CH_3-CH_2-Br →KCN A →[ Partial hydrolysis ]OH^- B →NaOH+Br_2 C2024
• Draw the structures of major product(s) in each of the following reactions: 1 × 32024
• A compound 'X' with molecular formula C_3 H_9 N reacts with C_6 H_5 SO_2 C l to give a solid, insoluble in alkali. Identify 'X'…2024
• Give the structures of A, B and C in the following reactions: CH_3 CH_2 Cl →KCN A →LiAlH_4 B →[0^° C]HNO_2 C2024
• Answer any five questions of the following: N,N-diethyl-benzenesulphonamide is insoluble in alkali. Give reason. Aniline does not…2024
• An amide 'A' with molecular formula C_7 H_7 ON undergoes Hoffmann Bromamide degradation reaction to give amine 'B'. B' on…2024
• Which of the following molecules has a chiral centre correctly labelled with an asterisk ( )?2023
• Which of the following is not true about enantiomers?2023
• When Benzene diazonium chloride reacts with phenol, it forms a dye. This reaction is called2023
• Among the following, which is the strongest base?2023asked 2×
• Among the following, which has the highest value of p^K b?2023
• Benzene diazonium chloride on hydrolysis gives:2023
• Which of the following is least basic?2023
• The reaction of ammonia with a large excess of methyl chloride will yield mainly:2023
• When nitrobenzene is heated with tin and concentrated HCl, the product formed is:2023
• The product formed in the reaction: is2023
• The action of nitrous acid on ethylamine gives mainly:2023
• Which of the following would not be a good choice for reducing nitrobenzene to aniline?2023
• The reduction of ethanenitrile with sodium and alcohol gives:2023
• Amides can be converted into amines by the reaction named2023
• In the reaction C_6 H_5 NH_2+CHCl_3+3 KOH → A+3 B+3 C the product A is2023
• CH_3 CONH_2 on reaction with NaOH and Br_2 in alcoholic medium gives:2023
• Assertion: (C_2 H_5)_2 NH is more basic than (C_2 H_5)_3 N in aqueous solution. Reason (R): In (C_2 H_5)_2 NH, there is more…2023
• Assertion (A):-NH_2 group is o -and p -directing in electrophilic substitution reactions. Reason (R): Aniline cannot undergo…2023
• Assertion: Ammonolysis of alkyl halides is not a suitable method for the preparation of pure primary amines. Reason (R):…2023
• Assertion: Acetylation of aniline gives a monosubstituted product. Reason (R): Activating effect of -NHCOCH_3 group is more than…2023
• Assertion: Monobromination of aniline can be conveniently done by protecting the amino group by acetylation. Reason (R):…2023
• Explain briefly: Carbylamine reaction Gabriel phthalimide synthesis2023
• Write the IUPAC name for the following organic compounds: Complete the following: C_6 H_5 NO_2 →Sn / HCl A →Br_2 / H_2 O B2023
• Do the following conversions in not more than two steps: 2 × 1 CH_3 CN to to = =C-CH_3 -COOH to 〈2023
• Write the chemical equation involved in the following reactions: 2 Carbylamine reaction Gabriel phthalimide synthesis2023
• (i) Draw the zwitter ion structure for sulphanilic acid. (ii) How can the activating effect of -NH_2 group in aniline be…2023
• Do the following conversions in not more than two steps: 2 × 1 CH_3 CN to to2023
• Write the structures of A, B and C in the following reactions: (ii) CH_3 CH_2 Br →KCN A →LiAlH_4 B →[0^° C]HNO_2 C OR How will…2023
• Illustrate Sandmeyer's reaction with an equation. Explain, why (CH_3)_2 NH is more basic than (CH_3)_3 N in aqueous solution.2023
• Amines are usually formed from nitro compounds, halides, amides, imides, etc. They exhibit hydrogen bonding which influences…2023
• (I) Give reasons: 3 + 2 (i) Aniline on nitration gives good amount of m-nitroaniline, though -NH_2 group is o/p directing in…2023
• Arrange the following compounds as directed: (any Two) (i) In decreasing order of basic strength in aqueous solution: C_2 H_5…2022
• An Organic compound with molecular formula C_3 H_7 NO on heating with Br_2 and KOH forms a compound. Compound on heating with…2022
• Account for the following: (i) pk_b of aniline is more than that of methylamine. (ii) Aniline does not undergo Friedel-Crafts…2022
• Write reasons for the following: (i) Ethylamine is soluble in water whereas aniline is insoluble. (ii) Amino group is o - and p…2022
• Illustrate the following reactions giving suitable example in each case: (i) Gabriel phthalimide synthesis. (ii) Carbylamine…2022
• Write equations involved in the following reactions: (i) Ethanamine reacts with acetyl chloride. (ii) Aniline reacts with bromine…2022
• A compound 'A' on reduction with iron scrap and hydrochloric acid gives compound 'B' with molecular formula C_6 H_7 N. Compound…2022
• An aromatic compound 'A' (C_7 H_6 O_2) on reaction with aqueous ammonia and heating forms compound ' B '. ' B ' on heating with…2022
• Give reasons: (i) Ammonolysis of alkyl halides is not a good method to prepare pure primary amines. (ii) Aniline does not give…2022
• A primary amine 'A' C_2 H_7 N reacts with alkyl halide (C_2 H_5 I) to give secondary amine 'B'. 'B' reacts with C_6 H_5 SO_2 Cl…2022
• Read the following passage and answer the questions that follow: Amines constitute an important class of organic compounds…2022

Answers come from CBSE’s own marking schemes. How we source them.