Loading [MathJax]/jax/output/CommonHTML/jax.js

CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 9 - MCQExams.com

Which of the following is correct formula for BDC?
  •   C6H4N2Cl
  •   C6H5N2
  •   C6H5N2Cl
  •    C6H4N2
In the reaction series: C6H5ClNH3Cu2O,200oCX;XHNO2050CZ;X+ZA, the number of σ and π bonds in A are:
  • 25σ and 6π
  • 25σ and 7π
  • 27σ and 7π
  • 27σ and 6π
Reaction at 050C between aniline, NaNO2 and HCl is known as____________
  • Suphonation of benzene
  • Acylation of aniline
  • Alkylation of aniline
  • Diazotisation
Among the following which is more basic :

Statement I: Aniline on reaction with NaNO2/HCl at 0oC followed by coupling with β-naphthol gives a dark blue coloured precipitate.
Statement II: The colour of the compound formed in the reaction of aniline with NaNO2/HCl at 0oC followed by coupling with β-naphthol.
  • Statement I and statement II are true and statement II is the correct explanation of statement I
  • Statement I and statement II are true and statement II is not the correct explanation of statement I
  • Statement I is true and the statement II is false
  • Statement I is false and the statement II is true
A compound A has molecular formula C7H7NO. On treatment with Br2 and KOH, A gives an amine B which gives carbylamine test. B upon diazotization and coupling with phenol gives an azo dye. A can be:
  • C6H5CONHCOCH3
  • C6H5CONH2
  • C6H5NO2
  • o,m or p-C6H4(NH2)CHO
The starting reagents needed to make the azo compound shown below is:
26636_ef344524a146453fab9b41a5fb9f38e8.png
Which of the following orders with regards to the basic strength of substituted aniline is correct?
  • p - methylaniline > p - chloroaniline > p - aminoacetophenone
  • p - methylaniline > p - aminoacetophenone > p - chloroaniline
  • p - aminoacetophenone > p - methylaniline > p - chloroaniline
  • p - aminoacetophenone > p - chloroaniline > p - methylaniline
Which of the following forms unstable diazonium ion when treated with NaNO2 in aqueous HCl?
  • p-nitrotoluene
  • ethylamine
  • N,N-dimethyl aniline
  • All of the above
The correct order of increasing basic nature for the bases  NH3,CH3NH2and(CH3)2NH in gas phase is :
  • (CH3)2NH<NH3<CH3NH2
  • NH3<CH3NH2<(CH3)2NH
  • CH3NH2<(CH3)2NH2<NH3
  • CH3NH2<NH3<(CH3)2NH
Amongst the following the most basic compound is :
  • p - nitroaniline
  • acetanilide
  • aniline
  • benzylamine
The major product expected, when Phthalmide is treated with NaOH, is :
Which of the following order for basic strength of amines is correct?

74900_983e8f8b3bdb4cdc93af1b54acd8ae3c.png
  • I>III>IV>II
  • IV>I>II>III
  • I>IV>II>III
  • I>II>IV>III
The increasing order of basic strength for the following compounds is:
(I) CH3CH2NH2
(II) CH3NHCH3
(III) CH3NHPh
(IV) CH3NHCHO
  • IV<III<I>II
  • III<IV<I>II
  • IV<III<II>I
  • II<I<III>IV
The product U is:

72533_45ed6e42e3af44fb953433b72f7f74b9.jpg
Which compound does not give positive test in Lassaigne's test for nitrogen?
  • Urea
  • Hydrazine
  • Azobenzene
  • Phenyl hydrazine
The correct order of basicity of the above compounds is given.
Identify the correct statement(s).
43841.PNG
  • In III, lone pair of electrons is involved in delocalisation but not in II.
  • In IV, lone pair of electrons is involved in delocalisation but not in III.
  • I is more basic than II because six membered ring is more stable than five membered ring.
  • In III, lone pair of electrons is present in sp orbital but in I, II and IV lone pair of electrons are present in sp2 orbital.
Aniline when diazotized in cold and then treated with dimethylaniline gives a coloured product. Its structure would be:
3HCCHpolymerisationXconc. H2SO4conc. HNO3YSn/HClZ(050C)NaNO2,HClVdil NaOHPhenolW
Product W is :
Which of the following is weakest base?
  • H2NCH2NO2
  • CH3NHCH=O
Which compound is soluble in water :
  • [(CH3)2NH2]+Cl
  • [CH3NH3]+Cl
  • [(CH3)3NH]+Cl
  • PhNO2
What is the principle product when aniline is treated with NaNO2 and HCl at 05C, and this mixture is added to p-toludine (p-methyl aniline)?
The following product(s) will be obtained from the above reaction:
121309_d6d1d31057454058810397464eb9aaac.png
Ethyl pthalimide on hydrolysis gives:
  • methyl alcohol
  • ethyl amine
  • dimethyl amine
  • diethyl amine
Which compound will liberate CO2 from NaHCO3 solution :
  • CH3CONH2
  • CH3NH2
  • (CH3)4N+OH
  • CH3N+H3Cl
Which of the following diazonium salt is relatively stable of 05C- :
  • CH3CH2NN}Cl
  • CH3C(CH3)2NN}Cl
  • CH3NN}Cl
  • (CH3)3CNN}Cl
Which of the following diazonium salt is relatively stable at 05C?
  • CH3NNCl
  • CH3CH(CH3)NNCl
  • C6H5NNCl
  • (CH3)3CNNCl
Of the following statements :
(P)C6H5N=CHC6H5 is a Schiff's base.
(Q)A dye is obtained by the reaction of aniline and C6H5N+NCl.
(R)C6H5CH2NH2 on treatment with [NaNO2+HCl] gives diazonium salt.
(S)pToluidine on treatment with [HNO2+HCl] gives diazonium salt.
  • only (P)and(Q) are correct
  • only (P)and(R) are correct
  • only (R)and(S) are correct
  • (P),(Q)and(S) are correct
Arrange the following in the increasing order of their basicities.
I.  p - Toluidine
II.  N, N - Dimethyl - p - toluidine
III.  p - Nitroaniline
IV.  Aniline
  • III < IV < I < II
  • II < IV < I < III
  • III < II < I < IV
  • I < IV < III < II
Which one(s) is/are true?
244984_4a91c8421a5843ef99c951718adf0721.png
  • (I) and (III) are modest Bronsted bases whereas (II) is not
  • In (III) Na is more basic than Nb
  • When (II) is protonated in the presence of a strong acid, protonation occurs at C2
  • All the nitrogen present in (I), (II), and (III) is sp2 hybridised
Arrange the following in their decreasing order of acidity.

244989_b3f46e7b98d94e01bbdc8ed803a45d2c.png
  • III>IV>I>II
  • I>II>III>IV
  • IV>III>II>I
  • II>III>I>IV
Which of the following is the product of the reaction shown above?
206794.png
  • (CH3)2CHCH2CH2NHNH2
  • [(CH3)2CHCH2CH2]2NH
  • (CH3)2CHCH2CH2NH2
  • (CH3)2CHCH2CH2CONH2
The decreasing order of basic characters of the following is :
245041_86a21bdb1e854fd1a74329652e535599.png
  • III > IV > I > II
  • II > I > IV > III
  • IV > III > II > I
  • I > II > III > IV
Which of the following statement(s) is/are correct?
244985_4a1a58265d4940aab28debbcc7a7befa.png
  • (I) and (II) are aromatic and have equal basic strength
  • (I) is aromatic and (II) is anti-aromatic, but (II) is stronger base than (I)
  • The order of basicity of the above compounds is (IV) > (III) > (II) > (I)
  • The conjugate acid of (IV) is more stabilised than the conjugate acid of (II)
Identify the most basic amine among the above compounds :
246541_5a5d451b1658448ebf39783fa8bd5e68.png
  • i
  • ii
  • iii
  • iv
Alkyl isocyanides (RNC) are reduced to 2 amines(RNHCH3) with:
  • LAH
  • NaBH4
  • HI+P
  • H2/Pt
Which statements are correct? 
  • Phenol and aniline give coupling reaction with diazonium salt.
  • Phenol couples with diazonium salt in mild basic conditions (pH=810).
  • Aniline couples with diazonium salt in mild acidic condition (pH=46).
  • Both phenol and aniline couple with diazonium salt in neutral condition (pH=7).
Compound (E) is:
Compound (A) is:
  • Ethylbenzene
  • pXylene
  • mXylene
  • oXylene
Compound (F) is:
Compound (D) is:
The following reaction is:
253878_ce022c735cb140a394a3fab0eb63a738.png
  • benzidine rearrangement
  • pinacol-pinacolone rearrangement
  • fries rearrangement
  • benzil-benzilic acid arrangement
The decreasing order of the rate of bromination of the following compounds is:
I.PhNMe3  
II.PhCH3NMe3  
III.PhMe  
IV.PhNMe2
  • (I)>(II)>(III)>(IV)
  • (IV)>(III)>(II)>(I)
  • (III)>(IV)>(I)>(II)
  • (III)>(IV)>(II)>(I)
Gabriel synthesis is used for the preparation of: 
  • 1o amine
  • 2o amine
  • 3o amine
  • all of the above
Which of the following orders regarding the basic strength of substituted aniline is correct?
  • p-methylaniline> p-chloroaniline > p-aminoacetophenone
  • p-methylaniline> p-aminoacetophenone> p-chloroaniline
  • p-aminoacetophenone> p-methylaniline> p-chloroaniline
  • p-aminoacetophenone> p-chloroaniline> p-methylaniline
Most basic compound in gaseous phase is :
  • NH3
  • CH3CH2NH2
  • (CH3CH2)2NH
  • (CH3CH2)3N
Benzenediazonium chloride on reaction with aniline in a weakly basic medium gives :
  • diphenyl ether
  • p-aminoazobenzene
  • chlorobenzene
  • benzene
Which of the following compounds has the lowest boiling point?
  • 2-propanamine
  • ethylmethylamine
  • 1-propanamine
  • N,N-dimethylmethanamine
Among the following, the strongest base is :
  • C6H5NH2
  • pNO2C6H4NH2
  • mNO2C6H4NH2
  • C6H5CH2NH2
Which of the following statement(s) is/are correct?
  • Primary amines show intermolecular hydrogen bonding.
  • Secondary amines intermolecular hydrogen bonding.
  • Tertiary amines show intermolecular hydrogen bonding.
  • Amines have lower boiling points as compared to those of alcohols and carboxylic acid of comparable molar masses.
0:0:2


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 12 Engineering Chemistry Quiz Questions and Answers