CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 7 - MCQExams.com

In the following componds the order of basicity is:
1717085_b1cc764d490245efb58092fae2090030.PNG
  • I > IV > II > III
  • II > I > IV > III
  • III > I > IV > II
  • IV > I > III > II
Which one of the following is the weakest base?
  • (C2H5)3N(C2H5)3N
  • (C2H5)2NH(C2H5)2NH
  • C2H5NH2C2H5NH2
  • NH3NH3
Strongest base is:
Among the following which one is most basic?
  • NH3NH3
  • CH3NH2CH3NH2
  • CH3CH2NH2CH3CH2NH2
  • C6H5NH2C6H5NH2
The strongest base among the following is:
  • Amide ion
  • Hydroxide ion
  • Trimethylamine
  • Ammonia
  • Aniline
Which of the following is the strong base?
Which nitrogen is prtonated redily in the guanidine?
1717920_c47fb1b460fa4964b4915b75174297bf.PNG
  • 1
  • 2
  • 3
  • None of these
The basicity of aniline is less than that of cyclohexylamine. This is due to:
  • -R effect of NH2 group
  • -I effect of NH2 group
  • + R effect of NH2 group
  • Hyperconjugation effect
This set contains the questions with single correct answer.
1718757_561703acc53d4f6eb4452ca312c63f21.PNG
  • primary amine
  • secondary amine
  • tertiary amine
  • quaternary salt
The compound
1718928_ab06676f1fd046a68de022f16fac634f.jpg
  • Alkyne, 3amine
  • Alkene, 2amine
  • Alkene, 3amine
  • Alkyne, 2amine
Amines are more basic than:
  • alcohols
  • ethers
  • esters
  • all of these
Which of the following is the most basic amine ?
  • CH3NH2
  • ClCH2NH2
  • Cl2CHNH2
  • CCl3NH2
Which among the following is amphoteric ?
  • CH3NH2
  • (CH3)2NH
  • (CH3)3N
  • CH3CONH2
Gabriel phthalimide synthesis is used in the preparation of: 
  • 1o amine
  • 2o amine
  • 3o amine
  • 4o amine
Which of the following is insoluble in dil. HCI ?
  • Aniline
  • Triphenylamine
  • Ethylamine
  • Dimethylamine
Which of the following has the highest pKb value ?
C2H5NH2 is neutral to litmus.
  • True
  • False
(CH3)2NH is a stronger base than (CH3)3N.
  • True
  • False
Which of the following may be prepared by Gabriel phthalimide synthesis ?
  • Aliphatic amines
  • Aromatic amines
  • Aliphatic amides
  • Aromatic amides
Amides are the oxidation products of nitriles (cyanides).
  • True
  • False
Aliphatic amines are insoluble in water.
  • True
  • False
Arrange following amines in the decreasing order of their basicity:
1719113_3f3a7468f3234396940caaa400ffcc13.PNG
  • I>III>II
  • I>II>III
  • III>II>I
  • II>III>I
CH3CH2NH2 contains a basic NH2 group, but CH3CONH2 does not because:
  • in CH3CONH2, the lone pair of electron on N-atom is delocalised due to resonance
  • CH3CONH2 is amphoteric in nature
  • in CH3CH2NH2, the lone pair of electrons on N-atom is delocalised due to resonance
  • CH3CONH2 is an acidic derivative
Which one of the following on reduction with LiAlH4 yields a secondary amine?
  • Methyl cyanide
  • Nitroethane
  • Methyl isocyanide
  • Acetamide
A solution of ethylamine:
  • turns blue litmus red
  • turns red litmus blue
  • does not affect the litmus
  • bleaches the litmus
C3H9N represents
  • primary amine
  • secondary amine
  • tertiary amine
  • all of these
Amines are Lewis acids.
  • True
  • False
Mark the correct statement:
  • methylamine is slightly acidic
  • methylamine is less basic than ammonia
  • methylamine is more basic than ammonia
  • methylamine forms salts with alkalies
Primary amines are less soluble than tertiary amines.
  • True
  • False
Which of the following is the least basic amine?
  • Methylamine
  • Ethylamine
  • Diethylamine
  • Aniline
  • Benzylamine
The correct order of basic nature of CH3NH2,(CH3)2NH,(CH3)3N and NH3 is:
  • CH3NH2>(CH3)2NH>(CH3)3N>NH3
  • (CH3)3N>(CH3)2NH>CH3NH2>NH3
  • (CH3)2NH>CH3NH2>(CH3)3N>NH3
  • NH3>(CH3)3N>CH3NH2>(CH3)2NH
Comparing basic strength of NH3, CH3NH2 and C6H5NH2, it may be concluded that:
  • basic strength remains unaffected
  • basic strength of NH3 is highest
  • basic strength of alkylamine is lowest
  • basic strength of arylamine is lowest
What is the_decreasing order of basicity of pri., sec., tert., ethyl amines and NH3?
  • NH3>C2H5NH2>(C2H5)2NH>(C2H5)3N
  • (C2H5)3N>(C2H5)2NH>C2H5NH2>NH3
  • (C2H5)2NH>C2H5NH2>NH3>(C2H5)3N>NH3
  • (C2H5)2NH>C2H5NH2>NH3>(C2H5)3N
The correct increasing order of basic strengths in,
CH3CH2CN,
CH3CH2NH2,
4CH3N=CHCH3$ is:
  • CH3N=CHCH3,CH3CH2NH2,CH3CH2CN
  • CH3CH2NH2,CH3N=CHCH3,CH3CH2CN
  • CH3CH2CN,CH3N=CHCH3,CH3CH2NH2
  • CH3CH2CN,CH3CH2NH2,CH3N=CHCH3
The boiling points of amines and their corresponding alcohols and acids vary in the order:
  • RCH2NH2>RCOOH>RCH2OH
  • RCH2NH2>RCH2OH>RCOOH
  • RCH2NH2 < RCOOH < RCH2OH
  • RCH2NH2 < RCH2OH < RCOOH
Among following the weakest base is:
  • C6H5CH2NH2
  • C6H5CH2NHCH3
  • O2NCH2NH2
  • CH3NHCHO
An isonitrile on reduction gives:
  • 3oamine
  • 2oamine
  • 1oamine
  • quaternary ammonium salts
Choose the correct order for the boiling points of amines:
  • CH3¨NH2>(CH3)2¨NH>(CH3)3¨N
  • (CH3)2¨NH>(CH3)3¨N>CH3¨NH2
  • (CH3)3¨N<CH3¨NH2<(CH3)2¨NH
  • CH3¨NH2<(CH3)2¨NH<(CH3)3¨N
Which has the highest pKb value?
  • R3CNH2
  • R2NH
  • RNH2
  • NH3
Which on reduction does not give primary amine?
  • CH3CN
  • C2H5NC
  • CH3CONH2
  • All of these
The basicity of compounds I, II, III and IV varies in the order:
CH3NH2I, (CH3)2NHII, (CH3)3NIII, C6H5CH2NH2IV 
  • I>II>III>IV
  • II>I>III>IV
  • III>I>II>IV
  • IV>I>II>III
The correct order of basic nature in aqueous solution is:
  • C6H5NH2>NH3>CH3NH2>(CH3)2NH
  • NH3>C6H5NH2>CH3NH2>(CH3)2NH
  • (CH3)2NH>CH3NH2>NH3>C6H5NH2
  • CH3NH2>(CH3)2NH>NH3>C6H5NH2
Which one of the following is most basic?
  • FCH2NH2
  • FCH2CH2NH2
  • C6H5NH2
  • C6H5CH2NH2
State, whether the following statements are True or False:
Aniline forms phenol when treated with nitrous acid.
  • True
  • False
Reduction of alkyl nitrile produces:
  • secondary amine
  • primary amine
  • tertiary amine
  • amide
Potassium phthalimide reacts with 'A' which on hydrolysis gives isopentylamine, whiat is 'A'?
Ethyl nitrite on reduction with Sn/HCI gives:
  • C2H5NH2+HNO2
  • C2H5NH2+H2O
  • C2H5OH+NH4OH
  • C2H5OH+NaNO2
Ethyl isocyanide on reduction with sodium and alcohol gives:
  • ethylamine
  • propylamine
  • dimethylamine
  • ethyl methylamine
An orange dye p-hydroxy azobenzene can be synthesized from benzene diazonium chloride by
  • Sandmeyer reaction
  • Gomberg reaction
  • Coupling reaction
  • Gattermann reaction
  • Etard reaction
Among the following, the strongest base is
  • C6H5NH2
  • pNO2C6H4NH2
  • pCH2C6H4NH2
  • C6H5CH2NH2
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