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Amines Class 12 MCQs Questions with Answers
Question 1.
Which of the following does not react with Hinsberg reagent?
(a) Ethylamine
(b) (CH3)2NH
(c) (CH3)3N
(d) Propan-2-amine
Answer
Answer: (c) (CH3)3N
Question 2.
above sequence, Z is
(a) Cyanoethane
(b) Ethanamide
(c) Methanamine
(d) Ethanamine
Answer
Answer: (d) Ethanamine
Question 3.
Oxidation of aniline with K2Cr2O7/H2SO4 gives
(a) phenylhydroxylamine
(b) p-benzoquinone
(c) nitrosobenzene
(d) nitrobenzene
Answer
Answer: (b) p-benzoquinone
Question 4.
Which of the following amines can exhibit enantiomerism?
(a) Benzeamine
(b) 2-Butanamine
(c) 2-Propanamine
(d) 2-Methyl-propanamine.
Answer
Answer: (b) 2-Butanamine
Question 5.
Which of the following: when heated with a mixture of ethanmine and alcoholic potash gives ethyl isocyanide?
(a) 2-chloropropane
(b) 2,2-dichloropropane
(c) trichloromethane
(d) tetrachloromethane
Answer
Answer: (c) trichloromethane
Question 6.
Which of the following pair of species will yield carbylamine?
(a) CH3CH2Br and KCN
(b) CH3CH2Br and NH3 (excess)
(c) CH3CH2Br and AgCN
(d) CH3CH2NH2 and HCHO
Answer
Answer: (c) CH3CH2Br and AgCN
Question 7.
Which one of the following methods is neither meant for the synthesis nor for separation of amines?
(a) Hinsberg method
(b) Hoffmann method
(c) Wurtz reaction
(d) Curticus reaction
Answer
Answer: (c) Wurtz reaction
Question 8.
C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by
(a) NaBH4
(b) H2-Pd/C
(c) LiAlH4
(d) Zn-Hg/HCl
Answer
Answer: (c) LiAlH4
Question 9.
C6H5N+2 Cl– + CuCN → C6H5CN + N2 + CuCl. The above chemical reaction is associated with which of the following name:
(a) Balz Schiemen
(b) Gattermann
(c) Shimonini
(d) Sandmeyer.
Answer
Answer: (d) Sandmeyer.
Question 10.
The reaction of aniline with benzoyl chloride gives
(a) Benzoin
(b) Benzanilide
(c) Benzalaniline
(d) Benzamide
Answer
Answer: (b) Benzanilide
Question 11.
Aniline was diazotised and is subsequently reduced with tin (II) chloride and HCl. The product formed is
(a) Phenylhydrazine
(b) Aniline
(c) Phenyl aniline
(d) p-aminoazobenzene.
Answer
Answer: (a) Phenylhydrazine
Question 12.
Which of the following will not give primary amine
(a) Dehydration of amide
(b) Acidic hydrolysis of alkyl isocyanides
(c) Reduction of amides
(d) Reduction of alkyl cyanides.
Answer
Answer: (a) Dehydration of amide
Question 13.
The reagents used in Hoffman’s Mustard oil reaction are
(a) Mustred oil and 1° amine
(b) CS2 and aniline in HgCl2
(c) Nitrobenzene and CS2
(d) Sand RNC.
Answer
Answer: (b) CS2 and aniline in HgCl2
Question 14.
Which of the following cannot couple with benzene diazonium chloride?
(a) Aniline
(b) Phenol
(c) ß-Napthol
(d) Benzyl alcohol.
Answer
Answer: (d) Benzyl alcohol.
Question 15.
The hybrid state of N is R2NH is
(a) sp³
(b) sp²
(c) sp
(d) dsp²
Answer
Answer: (a) sp³
Question 16.
The strongest base among the following is?
Answer
Answer: (c)
Question 17.
Which of the following is the strongest base?
Answer
Answer: (d)
Question 18.
Among the following, weakest base is
(a) C6H5CH NH2
(b) C6H5CH2NHCH3
(c) O2N-CH2NH2
(d) CH3CONH2
Answer
Answer: (d) CH3CONH2
Question 19.
Among the following, the dissociation constant is highest for
(a) C6H5OH
(b) C6H5CH2OH
(c) CH3-C = CH
(d) CH3N+H3Cl–
Answer
Answer: (d) CH3N+H3Cl–
Question 20.
Intermolecular hydrogen bonding is strongest in
(a) Methylamine
(b) Phenol
(c) Formaldehyde
(d) Methanol
Answer
Answer: (d) Methanol
Question 21.
Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water formed during the reaction is continuously removed. The compound formed is generally known as
(a) an enamine
(b) a Schiff’s base
(c) an amine
(d) an imine.
Answer
Answer: (a) an enamine
Question 22.
Among the following the most basic compound is
(a) benzylamine
(b) aniline
(c) acetanilide
(d) p-nitroaniline
Answer
Answer: (a) benzylamine
Question 23.
Aniline in a set of reactions yielded a product D.
The structure of D would be
(a) C6H5CH2OH
(b) C6H5CH2NH2
(c) C6H5NHOH
(d) C6H5NHCH2CH3.
Answer
Answer: (a) C6H5CH2OH
Question 24.
Reaction of aniline with benzaldehyde is
(a) Substitution
(b) addition
(c) Condensation
(d) polymerisation
Answer
Answer: (c) Condensation
Question 25.
Which is more basic?
(a) Benzylamine
(b) aniline
(c) Acetamide
(d) None of these
Answer
Answer: (a) Benzylamine
Question 26.
The compound that will react most readily with NaOH to form methanol is
(a) (CH3)4N+I–
(b) CH3OCH3
(c) (CH3)3SI–
(d) (CH3)3CCl
Answer
Answer: (a) (CH3)4N+I–
Question 27.
The correct order of increasing basic nature for the bases NH3, CH3NH2 and (CH3)2 NH is
(a) CH3 NH2 < (CH3)2 NH < NH3
(b) CH3NH2 < NH3 < (CH3)2NH
(c) (CH3)2 NH< NH3 < CH3NH2
(d) NH3 < CH3NH2 < (CH3)2NH
Answer
Answer: (d) NH3 < CH3NH2 < (CH3)2NH
Question 28.
Aniline first reacts with acetyl chloride producing compound A. A reacts with \(\frac {HNO_3}{H_2SO_4}\) mixture and produces comp and B which hydrolyses to compound C. What is the identity of C?
(a) Acetanilide
(b) p-Nitroacetanilide
(c) p-Nitroaniline
(d) Sulphanilic acid.
Answer
Answer: (c) p-Nitroaniline
Question 29.
Which is most basic?
(a) C6H5NH2
(b) (C6H5)2NH
(c) CH3NH2
(d) (CH3)2NH
Answer
Answer: (d) (CH3)2NH
Question 30.
The amine that does not react with acetyl chloride is
(a) CH3NH2
(b) (CH3)2NH
(c) (CH3)3 N
(d) none of these
Answer
Answer: (c) (CH3)3 N
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