NEET Chemistry Amines MCQs Set A

Question:

• a) Primary amine
• b) Secondary amine
• c) Tertiary amine
• d) Ammonium salt

Answer: Primary amine

Question:  The correct IUPAC name for

• a) Allyl methylamine
• b) 2-Amino4-pentene
• c) 4-Aminopent-I -ene 
• d) N-Methylprop-2-en-1-amine

Answer:  N-Methylprop-2-en-1-amine

Question:  The compound having the molecular formula C₃H₉N can represent

• a) Trimethylamine
• b) n-propylamine
• c) Isopropylamine
• d) All of these

Answer: All of these

Question: A secondary amine is

• a) A compound with two –NH₂ group
• b) A compound with two carbon atoms and a –NH₂ group
• c) A compound with a –NH₂ group on the carbon atom in number two position
• d) A compound in which two of the hydrogens of NH₃ have been replaced by alkyl or aryl groups

Answer:  A compound in which two of the hydrogens of NH₃ have been replaced by alkyl or aryl groups

Question: Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is

• a) Hoffmann bromamide reaction
• b) Gabriel phthalimide synthesis
• c) Sandmeyer reaction
• d) Reaction with NH₃

Answer: Gabriel phthalimide synthesis

Question: Gabriel phthalimide reaction is used for the preparation of

• a) Primary aromatic amines
• b) Secondary amines
• c) Aliphatic primary amines
• d) Tertiary amines

Answer: Aliphatic primary amines

Question: Gabriel phthalimide reaction is used for the preparation of

• a) Primary aromatic amines
• b) Secondary amines
• c) Aliphatic primary amines
• d) Tertiary amines

Answer: Aliphatic primary amines

Question:  When acetamide is treated with Br₂ and caustic soda, then we get

• a) Bromoacetic acid
• b) Acetic acid
• c) Methylamine
• d) Ethane

Answer: Methylamine

Question:

In above reaction hybridisation state of carbon changes from

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Amines are basic in character because they have

• a) A lone pair of electrons on the nitrogen atom
• b) A hydroxyl group in the molecule
• c) Replaceable hydrogen atom
• d) Saturated C atom

Answer: A lone pair of electrons on the nitrogen atom

Question: Which is most basic?

• a) Benzylamine
• b) Aniline
• c) Acetamide
• d) o-methyl aniline

Answer: Benzylamine

Question:  Aliphatic amines are ______ basic than NH₃ but aromatic amines are ______ basic than NH₃ .

• a) More, less
• b) Less, more
• c) Both (1) & (2)
• d) None of these

Answer: More, less

Question: Amongst the following, the strongest base in aqueous medium is

• a) CH₃NH₂  
• b) (CH₃)₃N
• c) (CH₃)₂NH  
• d)  C₆H₅NHCH₃

Answer: (CH₃)₂NH  

Question: Which of the following is the weakest Bronsted base?

• a)

  

• b)

  

• c)

  

• d) CH₃NH₂

Answer:

Question:  The correct increasing order of basic strength for the following compounds is

• a) II < III < I
• b) III < I < II
• c) III < II < I
• d) II < I < III

Answer: II < I < III

Question: Which of the following is the least basic?

• a)

  

• b)

  

• c)

  

• d) All are equally basic

Answer:

Question: The one which is the least basic

• a) NH₃   
• b) C₆H₅NH₂
• c) (C₆H₅)₃N 
• d) (C₆H₅)₂NH

Answer: (C₆H₅)₃N 

Question: Strongest base is

• a) CH₂= CH – CH₂– NH₂
• b) CH ≡ C – CH₂– NH₂
• c) CH₃CH₂CH₂NH₂
• d)

  

Answer:  CH₃CH₂CH₂NH₂

Question: CH₃CH₂NH₂ is more basic than CH₃CONH₂ because

• a) Acetamide is amphoteric in character
• b) In CH₃CH₂NH₂ the electron pair on N-atom is delocalised by resonance
• c) In CH₃CH₂NH₂ there is no resonance, while in acetamide the lone pair of electrons on N-atom is delocalised and therefore less available for protonation
• d) Acetamide is derivative of acid

Answer:  In CH₃CH₂NH₂ there is no resonance, while in acetamide the lone pair of electrons on N-atom is delocalised and therefore less available for protonation

Question: Which one is the most volatile?

• a) CH₃CH₂CH₂NH₂
• b) (CH₃)₃N
• c)

  

• d) CH₃OH

Answer:  (CH₃)₃N

Question: Aniline on reaction with acetyl chloride gives

• a) Phenol
• b) Acetamide
• c) Acetanilide
• d) Benzene

Answer: Acetanilide

Question: The compound obtained by heating a mixture of a primary amine and chloroform with ethanolic potassium hydroxide is

• a) An alkyl isocyanide
• b) An alkyl halide
• c) An amide
• d) An amide and nitro compound

Answer: An alkyl isocyanide

Question:  The decreasing order of the basic character of NH₃, CH₃NH₂, C₂H₅NH₂ and C₆H₅NH₂ is

• a) NH₃> CH₃NH₂> C₂H₅NH₂> C₆H₅NH₂
• b) C₂H₅NH₂> CH₃NH₂> NH₃> C₆H₅NH₂ 
• c) C₆H₅NH₂> C₂H₅NH₂> CH₃NH₂> NH₃
• d) CH₃NH₂> C₂H₅NH₂> C₆H₅NH₂> NH₃

Answer: C₂H₅NH₂> CH₃NH₂> NH₃> C₆H₅NH₂ 

Question:  An organic compound (A) on reduction gave a compound (B). Upon treatment with HNO₂ , (B) gave ethyl alcohol and on warming with CHCl₃ and alcoholic KOH, (B) gave an offensive smell. The compound (A) is

• a) CH₃NH₂
• b) CH₃NC  
• c) CH₃CN 
• d) C₂H₅CN

Answer:  CH₃CN 

Question: Which would not react with benzene sulphonyl chloride in aqueous NaOH?

• a) Aniline
• b) N, N-dimethylaniline
• c) p-toluidine
• d) N-ethyl aniline

Answer: N, N-dimethylaniline

Question: Reaction of nitrous acid with aliphatic primary amine in the cold gives

• a) A diazonium salt
• b) An alcohol
• c) A nitrite
• d) A dye

Answer: An alcohol

Question:  A compound X has the molecular formula C₇H₇NO. On treatment with Br₂ and KOH, X gives an amine Y. The latter gives carbylamine test. Y upon diazotisation and coupling with phenol gives an azo dye. Thus X is

• a) C₆H₅CONH₂
• b) C₆H₅CH₂NO 
• c) C₆H₅COONH₄ 
• d) All of these

Answer: C₆H₅CONH₂

Question:  An amine reacts with C₆H₅SO₂Cl and the product is soluble in alkali, amine is

• a) 1° amine
• b) 2° amine
• c) 3° amine
• d) All of these

Answer:  1° amine

Question: Tautomerism is shown by

• a) CH₃– O – NO
• b) CH₃– CH₂– NO₂
• c) CH₃CH₂CN
• d)

  

Answer:   CH₃– CH₂– NO₂

Question: The gas evolved when methylamine reacts with nitrous acid is

• a) NH₃  
• b) N₂
• c) H₂ 
• d) C₂H₆

Answer:  N₂

More Questions.......................................

Question:  A compound ‘A’ when treated with HNO₃ (in presence of H₂SO₄)gives compound B, which is then reduced with Sn and HCl to aniline. The compound is

• a) Toluene
• b) Benzene
• c) Ethane
• d) Acetamide

Answer: Benzene

Question:  A mixture of 1°, 2° and 3° amines can be separated by Hinsberg’s reagent which is

• a) Benzoyl chloride
• b) Acetyl chloride
• c) Benzene sulphonyl chloride
• d) Benzyl chloride

Answer: Benzene sulphonyl chloride

Question:  Identify X in the series.

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Bromine water reacts with aniline to give

• a) o-Bromoaniline
• b) m-Bromoaniline
• c) p-Bromoaniline 
• d) 2, 4, 6-Tribromoaniline

Answer:  2, 4, 6-Tribromoaniline

Question: Amines are highly soluble in

• a) CCl₄
• b) Diethyl ether
• c) Benzene
• d) Water

Answer: Water

Question:  Which of the following forms a stable diazonium salt at 273 - 278 K?

• a) Ethylamine
• b) Aniline
• c) Dimethylamine
• d) Benzylamine

Answer: Aniline

Question: Which one of the following compounds gives dye test?

• a) Aniline
• b) Methylamine
• c) Diphenylamine
• d) Ethylamine

Answer: Aniline

Question:  2, 4, 6-tribromo aniline is a product of

• a) Electrophilic addition on C₆H₅NH₂    
• b) Electrophilic substitution on C₆H₅NH₂
• c) Nucleophilic addition on C₆H₅NH₂ 
• d) Nucleophilic substitution on C₆H₅NH₂

Answer:  Electrophilic substitution on C₆H₅NH₂

Question: Benzenediazonium chloride on reaction with water gives

• a) Phenol
• b) Aniline
• c) Benzylamine
• d) Benzaldehyde

Answer: Phenol

Question: The strongest ortho-para and strongest meta directing groups are respectively

• a) –NO₂ and –NH₂
• b) –CONH₂ and –NH₂ 
• c) –NH₂ and –NO₂
• d) –NH₂ and CONH₂

Answer:  –NH₂ and –NO₂

Question: Benzenediazonium chloride on reaction with phenol in weakly basic medium gives

• a) Diphenyl ether
• b) p-Hydroxyazobenzene 
• c) Chlorobenzene
• d) Benzene

Answer:  p-Hydroxyazobenzene 

Question: When benzenediazonium chloride is heated with fluoro boric acid, fluorobenzene is formed. This reaction is called

• a) Balz Schiemann reaction
• b) Gattermann reaction
• c) Sandmeyer reaction
• d) Hofmann bromamide reaction

Answer: Balz Schiemann reaction

Question: Benzenediazonium chloride is reduced to benzene by

• a) Water
• b) Hypophosphorous acid
• c) Hypophosphoric acid
• d) Phosphine

Answer: Hypophosphorous acid

Question: Diazotisation can be carried out by the action of NaNO₂ and dilute HCI at ice cold temperature

• a) Aromatic secondary amine
• b) Aromatic primary amine
• c) Aromatic nitro compound
• d) Aliphatic amine

Answer: Aromatic primary amine

Question: When benzene diazonium chloride is treated with cuprous chloride and HCI the product formed is

• a) Chlorobenzene
• b) Benzene
• c) Phenol
• d) Chloroazobenzene

Answer: Chlorobenzene

Question:  The end product (Z) of the following reaction is

• a) A cyanide
• b) A carboxylic acid
• c) An amine
• d) An arene

Answer: An arene

Question:

The product (A) will be

• a) RNHCOCH₃ 
• b) RN(COCH₃)₂
• c)

  

• d) R–CONH₂

Answer:  RNHCOCH₃ 

Question: Alanine, the amino acid the respective structure at pH = 2 and pH = 10 will be

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Arrange the following compound in decreasing order of boiling point

• a) (CH₃)₃N < CH₃NHC₂H₅< C₃H₇NH₂< C₃H₇OH  
• b) (CH₃)₃N < C₃H₇NH₂< C₃H₇OH < CH₃NHC₂H₅
• c) C₃H₇NH₂< CH₃NHC₂H₅< (CH₃)₃N3H₇OH   
• d) (CH₃)₃N < CH₃NHC₂H₅< C₃H₇OH < CH₃H₇NH₂

Answer:  (CH₃)₃N < CH₃NHC₂H₅< C₃H₇NH₂< C₃H₇OH  

Question: Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

• a) Methyl isocyanide
• b) Acetamide
• c) Methyl cyanide
• d) Nitroethane

Answer: Methyl isocyanide

Question: Which product is formed, when acetonitrile is hydrolysed partially with cold concentrated HCl?

• a) Methyl cyanide
• b) Acetic anhydrides
• c) Acetic acid
• d) Acetamide

Answer: Acetamide

Question: Which of the following pair make fastest coupling reaction in acidic medium?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following statements about primary amines is ‘False’?

• a) Alkyl amines are stronger bases than ammonia
• b) Alkyl amines are stronger bases than aryl amines
• c) Alkyl amines react with nitrous acid to produce alcohols
• d) Aryl amines react with nitrous acid to produce phenols

Answer: Aryl amines react with nitrous acid to produce phenols

Question: The reaction of the benzyl chloride with sodium cyanide followed by reduction with hydrogen in the presence of nickel gives

• a) β-phenyl ethylamine 
• b) N-isobutylaniline
• c) Benzyl amine
• d) Aniline

Answer: β-phenyl ethylamine  

Question: The most reactive compound towards Hofmann bromamide degradation is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Amine is obtained as major product in

• a)

  

• b)

  

• c)

  

• d) All of these

Answer:

Question:

The major product (B) is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Benzylamine and aniline can be distinguish by

• a) HNO₂ acid 
• b) CHCl₃/KOH
• c) Br₂ water 
• d) Schiff ’s reagent

Answer: Br₂ water 

Question:  4-Nitro-N, N-dimethyl benzenamine is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  N-phenyl hydroxylamine is obtained when nitro benzene is reacted with

• a) Sn/HCl
• b) Zn/NH₄Cl/H₂O
• c) As₂O₃/NaOH  
• d) Zn/NaOH

Answer:   Zn/NH₄Cl/H₂O