Class 12 Chemistry Chapter 13 Amines MCQs | Class 12 Chemistry Chapter 13 Amines Objective Type Questions and Answers

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Questions
1 Secondary amines can be prepared by
A reduction of nitro compounds
B oxidation of N-substituted amides
C reduction of isonitriles
D reduction of nitriles

Answer:reduction of isonitriles
2 Which of the following amides will give ethylamine on reaction with sodium hypobromide?
A Butanamide
B Propanamide
C Acetamide
D Benzamide

Answer:Propanamide
3 Benzoic acid is treated with SOCl2 and the product (X) formed is reacted with ammonia to give (Y). (Y) on reaction with Br2 and KOH gives (Z). (Z) in the reaction is
A aniline
B chlorobenzene
C benzamide
D benzoyl chloride

Answer:aniline
4 Amine that cannot be prepared by Gabricl-Phthalmidie synthesis is
A aniline
B benzyl amine
C methyl amine
D iso-butylamine

Answer:aniline
5 Tertiary amines have lowest boiling points amongst isomeric amines because
A they have highest molecular mass
B they do not form hydrogen bonds
C they are more polar in nature
D they are most basic in nature

Answer: they do not form hydrogen bonds
6 Which of the following amines will give carbylatnine reaction?
A (C2H5)3N
B (C2H5)2NH
C C2H5NH2
D C3H7NHC2H35

Answer:C2H5NH2
7 Primary and secondary amines are distinguished by
A Br2/ROH
B HClO
C HNO2
D NH3

Answer:HNO2
8 Arrange the following compounds in increasing order of basicity:
CH3NH2, (CH3)2 NH, NH3, C6H5NH2
A C6H5NH2 < NH3 < (CH3)2NH < CH3NH2
B CH3NH2 < (CH3)2NH < NH3 < C6H5NH2
C C6H5NH2 <NH3 < CH3NH2<(CH3)2NH
D (CH3)2NH < CH3NH2 <NH3 < C6H5NH2

Answer:C6H5NH2 <NH3 < CH3NH2<(CH3)2NH
9 Which of the following species are involved in the carbvlamine test?
(i) RNC
(ii) CHCl3
(iii) COCl2
(iv) NaNO2 + HCl
A (i) and (iv)
B (i) and (ii)
C (ii) and (iv)
D (ii) and (iii)

Answer: (i) and (ii)
10 Which of the following from isocyanide on reaction with CHCl and KOH?
A C6H5NHCH3
B CH3C6H4NH2
C C6H5NHC4H9
D C6H5N (C2H5)2

Answer: CH3C6H4NH2
11 Which of the following is used as Hinsberg’s reagent?
A C6H5SO2Cl
B C6H5SO3H
C C6H5NHCH3
D C6H5COCH3

Answer: C6H5SO2Cl
12 Electrophilic substitution of aniline with bromine water at room temperature gives
A 2-bromoaniline
B 3-bromoaniline
C 2, 4, 6-tribromoaniline
D 3, 5, 6-tribromoaniline

Answer: 2, 4, 6-tribromoaniline
13 Among the compounds C3H7NH2, CH3NH2, C2H5NH2, and C6H5NH2. Which is the least basic compound?
A CH3NH2
B C2H5NH2
C C3H7NH2
D C6H5NH2

Answer: C6H5NH2
14 Anilinium hydrogensulphate on heating with sulphuric acid at 453-473 K produces
A sulphanilic acia
B benzenesulphonic acid
C aniline
D anthranilic acid

Answer:sulphanilic acia
15 In this reaction acetamide is converted to methanamine
A Gabriel phthalimide synthesis
B Carbylamine reaction
C Stephen’s reaction
D Hoffmann bromamide reaction

Answer:Hoffmann bromamide reaction
16 Which of the following is true for the basicity of amines?
A Alkylamines are generally less basic than arylamines because N is sp hybridised
B Arylamines are generally more basic than alkylamines due to aryl group
C Arylamines are generally less basic than alkylamines due to delocalisation of lone pair of electrons in the benzene ring
D Alkylamines are generally less basic than arylamines because lone pair of electrons on N in the arylamines are not delocalised in the benzene ring

Answer: Arylamines are generally less basic than alkylamines due to delocalisation of lone pair of electrons in the benzene ring
17 How many structural isomers are possible for C3H9N?
A 4
B 2
C 5
D 3

Answer:4
18 Which of the following is incorrect for primary amines?
A On reaction with nitrous acid alkylamines produce alcohol
B On reaction with nitrous acid arylamines produce phenol
C Alkylamines are more basic than ammonia
D Alkylamines are more basic than arylamines

Answer: On reaction with nitrous acid arylamines produce phenol
19 Aniline is less basic than
A Benzylamine
B Triphenylamine
C p-Nitroaniline
D Diphenylamine

Answer: Benzylamine
20 Which of the following is formed when an alkyl primary amine reacts with nitrous acid?
A Alkyl nitrite
B Secondary amine
C Nitroalkane
D Alcohol

Answer: Alcohol

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