CBSE Class 12 Amines with Answers Multiple Choice Questions with Answers. MCQ Questions Class 12 Amines with Answers with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Amines with Answers MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Amines with Answers - Set - 3
Question 1:
The action of nitrous acid on an aliphatic primary amine gives
(a) secondary amine
(b) nitro alkane
(c) alcohol
(d) alkyl nitrite
Correct Answer – (C)
Question 2:
Phenyl isocyanides are prepared by which of the following reaction?
(a) Reimer–Tiemann reaction
(b) Carbylamine reaction
(c) Rosenmund’s reaction
(d) Wurtz reaction
Correct Answer – (B)
Question 3:
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
(a) inspite of substituents nitro group always goes to only m-position
(b) in electrophilic substitution reactions amino group is meta directive
(c) in absence of substituents nitro group alwaysgoes to m-position
(d) in acidic (strong) medium aniline is present as anilinium ion
Correct Answer – (D)
Question 4:
Indicate which nitrogen compound amongst the following would undergo Hoffmann reaction (i.e.,reaction with Br2 and strong KOH) to furnish the primary amine (R–NH2)?
(a) RCONHCH3
(b) RCOONH4
(c) RCONH2
(d) R – CO – NHOH
Correct Answer – (C)
Question 5:
Intermediates formed during reaction of RCONH2 with Br2 and KOH are
(a) RCONHBr and RNCO
(b) RNHCOBr and RNCO
(c) RNH – Br and RCONHBr
(d) RCONBr2
Correct Answer – (A)
MCQ Questions Class 12 Amines With Answers
Question 6:
The compound obtained by heating a mixture of ethylamine and chloroform with ethanolic potassium hydroxide (KOH) is
(a) an amide
(b) an amide and nitro compound
(c) an ethyl isocyanide
(d) an alkyl halide
Correct Answer – (C)
Question 7:
The correct statement regarding the basicity of arylamines is
(a) arylamines are generally more basic than alkylamines because of aryl group
(b) arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridised
(c) arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalised by interaction with the aromatic ring p-electron system
(d) arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalised by interaction with the aromatic ring p-electron system
Correct Answer – (C)
Question 8:
The correct order of the basic strength of methyl substituted amines in aqueous solution is
(a) CH3NH2 > (CH3)2NH > (CH3)3N
(b) (CH3)2NH > CH3NH2 > (CH3)3N
(c) (CH3)3N > CH3NH2 > (CH3)2NH
(d) (CH3)3N > (CH3)2NH > CH3NH2
Correct Answer – (B)
Question 9:
Amides may be converted into amines by a reaction named after
(a) Hoffmann
(b) Claisen
(c) Perkin
(d) Kekule
Correct Answer – (A)
Question 10:
Which of the following is strongest base?
(a) C6H5NH2
(b) p -NO2—C6H4NH2
(c) m-NO2—C6HNH2
(d) C6H5CH2NH2
Correct Answer – (D)
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