CBSE Class 12 Chemistry Amines MCQs Set C

Question: Which of the following compounds is soluble in benzene but almost insoluble in water? 
(a) C₂H₅OH
(b) CH₃CO₂H
(c) CH₃CHO
(d) C₆H₅NO₂ 
Answer: d

Question: Nitrobenzene is reduced by Zn and alcoholic potash mixture to get 
(a) C₆H₅—NH₂
(b) C₆H₅—NH—NH—C₆H₅
(c) C₆H₅—N—N—C₆H₅
(d) C₆H₅—NH—CO—C₆H₅
Answer: b

Question: Alkyl cyanides undergo Stephen reduction to produce
(a) aldehyde 
(b) secondary amine
(c) primary amine
(d) amide
Answer: a

Question: Methyl cyanide gives on hydrolysis 
(a) methyl amine
(b) acetic acid
(c) formic acid
(d) ethyl amine
Answer: b

Question: Compare boiling point of isomeric alkyl amines.
(a) 1° > 2° > 3°
(b) 1° > 2° < 3°
(c) 1° < 2° < 3°
(d) 1° < 2° > 3°
Answer: a

Question: An organic compoundA having molecular formula C₂H₃N on reduction gave another compound B, upon treatment with nitrous acid B gave ethyl alcohol. On warming with chloroform and alcoholic KOH, it formed an offensive smelling compound C. The compound C is 
(a) CH₃CH₂NH₂
(b) CH₃CH₂N=C
(c) CH₃C= N
(d) CH₃CH₂ ·OH 
Answer: b

Question: The correct order of basic strength in aqueous solution is
(a) (CH₃)₂NH > CH₃NH₂ > (CH₃)₃N
(b) (CH₃)₃N > (CH₃)₂NH > CH₃NH₂
(c) CH3NH2 > (CH₃)₃N > (CH₃)₂NH
(d) (CH₃)₃N > CH₃NH₂ > (CH₃)₂NH
Answer: a

Question: Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains.
(a) mixture of o and p-bromotoluenes
(b) mixture of o and p -dibromobenzenes
(c) mixture of o and p-bromoanilines
(d) mixture of o and m-bromotoluenes
Answer: a

Question: C₆H₅NH₂ →_180°C^H₂SO₄ NH₂C₆H₄ (SO₃H)
para-fonn
The true statement about the product is 
(a) it does not exist as Zwitter ion
(b) it does not act as inner salt
(c) —SO₃ diminishes the basic character of —NH₂
(d) —NH₂ displays a powerful basic character
Answer: c 

Question: Considering the basic strength of amines in aqueous solution, which one has the smallest pK b value?
(a) (CH₃)₂ NH
(b) CH₃NH₂ 
(c) (CH₃)₃N
(d) C₆H₅NH₂
Answer: a

Question: Aromatic primary amines can be distinguished from aliphatic primary amines by
(a) Tollen's test
(b) action on red litmus paper
(c) azo dye test
(d) action with dil. HCI
Answer: c

Question: Which one of the following compounds will dissolve in an alkali solution after it has undergo reaction with Hinsberg's reagent?
(a) CH₃NH₂
(b) (CH₃)₃ N
(c) (C₂H₅)₂NH
(d) C₆H₅NHC₆H₅
Answer: a

Question: In alkyl cyanide alkyl group attached with 
(a) C of CN group
(b) N of CN group
(c) Either C or N of CN group
(d) Both C and N of CN group
Answer: a 

Question: Acetonitrile on reduction gives 
(a) propanamine
(b) methanamine
(c) ethanamine
(d) None of these
Answer: c

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

Question: Reduction of nitrobenzene in the presence of Zn /NH₄ Cl gives 
(a) azobenzene
(b) hydrazobenzene
(c) N-phenyl hydroxylamine
(d) aniline
Answer: c

Question: The main product of the reaction of CH₃CONH₂ with Br₂ in aqueous potassium hydroxide medium is 
(a) CH₃—CH₂—NH₂
(b) CH₃Br
(c) CH₃CONHBr
(d) CH₃NH₂
Answer: d

Question: In the reaction, R—C= N + 4 (H)→^x RCH₂NH₂ X can be
(a) LiAIH₄
(b) H₂SO₄
(c) Ni
(d) 2KBr
Answer: a

Question: Benzamide can be converted into benzonitrile with
(a) H₃O⁺
(b) OH^-/ H₂O 
(c) KCN
(d) P₂O₅
Answer: d

Question: C₆H₅NO₂ →^{Sn/ HCI} C₆H₅ X, 'X' is identified as 
(a) NO
(b) -NH₂
(c) NHOH
(d) None of the above
Answer: b

Question: Final product of hydrolysed alkyl cyanide is 
(a) RCOOH
(b) RCONH₂
(c) R—C= NH
            l
           OH
(d) R—C= N^⊕H
Answer: a

Question: Choose the inco1Tect statement. 
(a) Primary amines show intermolecular hydrogen bonds
(b) tert-butylamine is a primary amine
(c) Tertiary amines do not show intermolecular hydrogen bonds
(d) Iso-propylamine is a secondary amine
(e) Amines have lower boiling points as compared to those of alcohols of comparable molecular mass
Answer: d 

Question: An aromatic compound A (C₇H₉N) on reacting with NaNO₂ /HCl at 0°C forms benzyl alcohol and nitrogen gas. The number of isomers possible for the compound A is 
(a) 5
(b) 7
(c) 3
(d) 6
Answer: a

Question: The reduction of which of the following compound would yield secondary amine? 
(a) Alkyl nittile
(b) Carbylamine
(c) Ptimary amine
(d) Secondary nitro compound
Answer: b

Question: Nitration ofnitrobenzene at 125°C with mixed acids gives
(a) meta-dinitrobenzene
(b) ortho-dinitrobenzene
(c) para-dinitrobenzene
(d) 1, 3, 5-trinitrobenzene
Answer: a

Question: n-butylamine (I), diethylamine (II) and N, N-dimethylethylamine (III) have the same molar mass.
The increasing order of their boiling point is
(a) III < II < I
(b) I < II < III
(c) II < III < I
(d) II < I < III
(e) III < I < II
Answer: a 

Question: Which of the following reactions can produce aniline as main product?
(a) C₆H₅NO₂ 
(a) C₆H₅NO₂ + Zn / KOH
(b) C₆H₅NO₂ + Zn / NH₄Cl
(c) C₆H₅NO₂ + LiAIH₄
(d) C₆H₅NO₂ + Zn / HCl
Answer: d

Question: Which is not the property of ethanenitrile (CH₃CN)?
(a) Undergoes acidic hydrolysis to give carboxylic acid
(b) Undergoes alkaline hydrolysis to give salt of carboxylic acid
(c) It tautometises to give methyl isocyanide
(d) It gives carbylamine reaction with chloroform 
Answer: d

Question: Which one of the following does not have sp² hybridised carbon?
(a) Acetone
(b) Acetic acid
(c) Acetonitrile
(d) Acetamide
Answer: c

Question: The molecular formula ofbenzonitrile is
(a) C₆H₅CN
(b) C₆H₅NC
(c) C₆H₅CNO
(d) C₆H₅NCO 
Answer: a

Question: Amongst the following, the most basic compound is
(a) benzylamine
(b) aniline 
(c) acetanilide
(d) p-nitroaniline
Answer: a

Question: How many sigma and pi-bonds are there in the molecule of dicyanoethene (CN—CH=CH—CN)?
(a) 3 sigma and 3 pi
(b) 5 sigma and 2 pi
(c) 7 sigma and 5 pi
(d) 2 sigma and 3 pi
Answer: c

Question: Aniline+ Excess of Br² →?
(a) Tribromo benzene
(b) m -bromo aniline
(c) 3, 4, 5-tribromo aniline
(d) 2, 4, 6-tribromo aniline
Answer: d

Question: Which one does not liberate NH₃ when undergoes hydrolysis?
(a) AcetaniIide
(c) Acetamide
(b) Acetonittile
(d) Phenyl isocyanide
Answer: d

Question: Which of the following processes does not yield a primary amine? 
(a) CH₃COCH₃ + NH₃ + H₂ →^Ni
(b) CH₃CH₂CN + H₂ →^Ni_140°C
(c) CH₃CHO + H₂NOH →^{Na,C₂H₅OH}
(d) CH₃CHO + N₂CH₂ →^NaBH₄
Answer: d

Question: N-methyl aniline on reaction with nitrous acid gives
(a) N-nitroso-N-methylaniline 
(b) p-nitroso-N-methylaniline
(c) p-nitro-N-methylaniline
(d) N-nitro-N-methylaniline
Answer: a

Question: When aniline reacts oil of bitter almonds, condensation takes place and benzyl derivatives are formed. These are known as 
(a) Millon's base
(b) Scruff's reagent
(c) Benedict reagent
(d) Scruff's base 
Answer: d

Question: Reduction of alkyl nitriles, produces 
(a) secondary amine
(b) primary amine
(c) tertiary amine
(d) amide
Answer: b

Question: What is IUP AC name of iso-propylamine? 
(a) Propan-2-amine
(b) Ethanamine
(c) 2-aminotoluene
(d) Propan-1-amine
Answer: a

Question: Acetonitriles on hydrolysis produce which of the following? 
(a) Amine
(b) Acid
(c) Amides
(d) Carbonyl compounds
Answer: d

Question: Which compound is known as alkyl carbylamine?
(a) R · CN
(b) R · NC 
(c) Ar · CN
(d) Ar · NC
Answer: b

Question: Ethyl isocyanide on hydrolysis in acidic medium generates
(a) ethylamine salt and methanoic acid 
(b) propanoic acid and ammonium salt
(c) ethanoic acid and ammonium salt
(d) methylamine salt and ethanoic acid
Answer: a 

Question: In the reaction,
CH₃CN + 2H →_SnCI2^HCI X →^{Boiling H₂O} Y
The term Y is 
(a) acetone
(b) ethanamine
(c) acetaldehyde
(d) dimethyl amine 
Answer: c

Question: Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with 
(a) any aliphatic amine
(b) any amine
(c) any primary amine
(d) any aromatic amine 
Answer: c 

Question: Aliphatic nitrites are prepared by the treatment of alkyl halides with 
(a) sodium cyanide
(b) sodium isocyanide
(c) sodium isocyanate
(d) cyanamide
Answer: a