CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 1 - MCQExams.com

Which of the following is NOT a correct method of the preparation of benzylamine from cyanobenzene?
  • (i) $$HCl/ H_{2}O$$ (ii) $$NaBH_{4}$$
  • (i) $$LiAlH_{4}$$ (ii) $$H_{3}O^{+}$$
  • (i) $$SnCl_{2} + HCl(gas)$$ (ii) $$NaBH_{4}$$
  • $$H_{2}/ Ni$$
Considering the basic strength of amines in aqueous solution, which one has the smallest $$ pK_{b}$$ value?
  • $$ (CH_{3})_{3}N$$
  • $$ C_{6}H_{5}NH_{2}$$
  • $$ (CH_{3})_{2}NH$$
  • $$ CH_{3}NH_{2}$$
In the following reactions, the major product W is:
351972.png
Consider the following four compounds I, II, III, and IV.
Choose the correct statement(s).

1950134_4990fe7d31a948cfb48a5d30d2432bb5.png
  • The order of basicity is $$II > I > III > IV$$.
  • The magnitude of $$pK_b$$ difference between $$I$$ and $$ II$$ is more than that between $$ III$$ and $$IV.$$
  • Resonance effect is more in $$III$$ than in $$IV.$$
  • Steric effect makes compound $$ IV$$ more basic than $$III.$$
The correct statement regarding the basicity of arylamines is:
  • arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring $$\pi$$ electron system.
  • arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring $$\pi$$ electron system.
  • arylamines are generally more basic than alkylamines because of aryl group.
  • arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized.
Which of the following will be most stable diazonium salt $$RN_2^+X^-$$?
  • $$CH_3N_2^+X^-$$
  • $$C_6H_5N_2^+X^-$$
  • $$CH_3CH_2N_2^+X^-$$
  • $$C_6H_5CH_2N_2^+X^-$$
Which of the following compounds is most basic?

In the following reaction, the product (A) is:
313373_a949be68a51e4c7bbac2154d0578f815.png
The major product of the following reaction is:
1618797_ebf66becdb3b46099b6de3464acd274c.png
The correct order of the basic strength of methyl substitited amines in aqueous solution is :
  • $$(CH_3)_2NH> CH_3NH_2> (CH_3)_3N$$
  • $$(CH_3)_3N> CH_3NH_2>(CH_3)_2NH$$
  • $$(CH_3)_3N> (CH_3)_2NH>CH_3NH_2$$
  • $$CH_3NH_2>(CH_3)_2NH> (CH_3)_3N$$
In the given replacement reaction, the reaction will be most favourable if $$M$$ happens to be:
311421_5f9c0b5435ed4b6eb322f99c3f252b44.png
  • $$K$$
  • $$Rb$$
  • $$Li$$
  • $$Na$$
Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?
  • $${H}_{2}(excess)/Pt$$
  • $$LiAl{H}_{4}$$ in ether
  • $$Fe$$ and $$HCl$$
  • $$Sn$$ and $$HCl$$

The correct decreasing order of $$pK_{b}$$ is:

471189_cb5754fc59624f4080b1e42a4e5f615e.png
  • $$I > II > III > IV$$
  • $$III > IV > III > I$$
  • $$II > III > IV > I$$
  • $$IV > II > I > III$$
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
Which one of the following will be most basic?
  • Aniline
  • P-methoxyaniline
  • P-nitroaniline
  • Benzylamine
Which of the following statements is not correct?
  • Methylamine is more basic than $$NH_{3}$$.
  • Amines form hydrogen bonds.
  • Ethylamine has higher boiling point than propane.
  • Dimethylamine is less basic than methylamine.
Which amino acid in present only in bacteria and cyanobacteria ?
  • Glycine
  • Tyrosine
  • Glutamic acid
  • Diaminopimellic acid
Which of the following compound gives secondary amine on reduction?
  • Alkyl nitrile
  • Carbylamine
  • Primary amine
  • Secondary nitro compound
A mixture containing primary, secondary and tertiary amine is treated with diethyl oxalate. Choose the correct statement:
  • The distillate of the mixture after treatment mainly contains $$1^o$$ amines.
  • Tertiary amine do not react with diethyl oxalate
  • This is Hinsberg method of separating $$1^o ,2^o$$ and $$3^o$$ amines.
  • $$3^∘$$ amine is removed by filtration
Product D is
1142755_491c5675b93c4b8cbde0f614bb8927d3.PNG
  • $$H_5C_2-NH_2$$
  • $$H_5C_2-OH$$
  • None
Benzylamine is a stronger base than________________
  • Aniline
  • Acetamide
  • o-methylaniline
  • All of these
The strongest base in aqueous solution among the following amines is:
  • N-N-diethylethanamine
  • N-ethylethanamine
  • N-methylmethanamine
  • ethanamine
  • phenylmethanamine
A primary amine {B), on treatment with a solution of $$AuCl_{3}$$ in conc. $$HCl$$ yields a compound whose formula would be?
  • $$(BH)^{+}.AuCl_{4}^{-}$$
  • $$(BH_{2})^{+}.AuCl_{4}^{-2}$$
  • $$(BH)^{+}.HAuCl_{4}^{-}$$
  • $$B.AuCl_{4}$$
Which of the following is a $${ 1 }^o$$ amine? 
  • $$\left( { CH }_{ 3 } \right) _{ 3 }{ CNH }_{ 2 }$$
  • $${ C }_{ 6 }{ H }_{ 5 }{ NHCH }_{ 3 }$$
  • $${ CH }_{ 3 }NHCH\left( { CH }_{ 3 } \right) _{ 2 }$$
  • $$\left( { CH }_{ 3 }{ CH }_{ 2 } \right) _{ 2 }NCH_{ 3 }$$
Which of the following is a secondary amine?
  • $${ H }_{ 2 }N-{ NH }_{ 2 }$$
  • $${ CH }_{ 3 }-{ NH }_{ 2 }$$
  • $$\left( { CH }_{ 3 } \right) _{ 2 }{ NC }_{ 6 }{ H }_{ 5 }$$
  • $$C_{ 6 }{ H }_{ 5 }-NH-{ CH }_{ 3 }$$
Which of the following is a secondary amine?
  • Dimethylamine
  • Aniline
  • Isobutylamine
  • Secondary butyl amine
The correct order of basic strength is:
  • $${ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }>{ CH }_{ 3 }{ NH }_{ 2 }>{ NH }_{ 3 }$$
  • $${ CH }_{ 3 }{ NH }_{ 2 }>{ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }>{ NH }_{ 3 }$$
  • $${ CH }_{ 3 }{ NH }_{ 2 }>{ NH }_{ 3 }>{ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $${ NH }_{ 3 }={ CH }_{ 3 }{ NH }_{ 2 }={ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
Term tertiary, secondary and primary amine represents the: 
  • number of amino groups
  • nature of C atom
  • degree of substitution on nitrogen
  • degree of uunsaturation
Which of the following is secondary amine?
  • $${ CH_3-NH }_{ 2 }$$
  • $$CH_3-N-(C_2H_5)_2$$
  • $$CH_3-NHCH_3$$
  • $$CH_3-N(CH_3)_2$$
Amines are the derivatives of:
  • acids
  • ammonia
  • alkanes
  • esters
$$o-Br-{ C }_{ 6 }{ H }_{ 4}-{ NH }_{ 2 }$$ is :
  • aliphatic $${ 1 }^{ 0 }$$ - amine
  • aromatic $${ 1 }^{ 0 }$$ - amine
  • aliphatic $${ 2 }^{ 0 }$$ - amine
  • aromatic $${ 2 }^{ 0 }$$ - amine
Which of the following amines form unstable diazonium salt?
  • $${ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\left( { C }_{ 2 }{ H }_{ 5 } \right) _{ 2 }NH$$
  • $$\left( { C }_{ 2 }{ H }_{ 5 } \right) _{ 3 }N$$
  • $${ CH }_{ 3 }{ NHC }_{ 2 }{ H }_{ 5 }$$
The structural formula of N-methylaminomethane is:
  • $$\left( { CH }_{ 3 } \right) _{ 2 }{ CHNH }_{ 2 }$$
  • $$\left( { CH }_{ 3 } \right) _{ 3 }N$$
  • $$\left( { CH }_{ 3 } \right) _{ 2 }NH$$
  • $${ CH }_{ 3 }{ NH }_{ 2 }$$
Which of the following is more appropriate reason for aniline being less basic than aliphatic amines?
  • Inductive effect
  • Steric hindrance
  • Positive mesomeric effect
  • Negative mesomeric effect
$$-{ NH }_{ 2 }$$ group is only:
  • ortho director
  • only meta director
  • only para director
  • both ortho, para director
The structure given below represents:
23465_07e87458c58d429bb109b4ee7cd4851a.png
  • quarternary ammonium Salt.
  • primary amine.
  • secondary amine.
  • tertiary amine.
Aniline when treated with $$NaNO_{ 2 }$$ and $$HCl$$ at $$0- { 5 }^{ 0 }C$$ gives ____________ as a product.
  • chloroaniline
  • benzene diazonium chloride
  • chlorobenzene
  • dichlorobenzene
The structural formula of methylamino methane is:
  • $$(CH_{3})_{2}CHNH_{2}$$
  • $$(CH_{3})_{3}N$$
  • $$(CH_{3})_{2}NH$$
  • $$CH_{3}NH_{2}$$
$${ C }_{ 3 }{ H }_{ 9 }N$$ cannot represent:
  • $${ 1 }^{ 0 }$$ amine
  • $${ 2 }^{ 0 }$$ amine
  • $${ 3 }^{ 0 }$$ amine
  • quaternary salt
The correct order of basic strength of given aniline is:
  • o - nitroaniline > p - nitroaniline > m - nitroaniline
  • m - nitroaniline > p - nitroaniline > o - nitroaniline
  • m - nitroaniline > o - nitroaniline > p - nitroaniline
  • o - nitroaniline > m - nitroaniline > p - nitroaniline
When aniline in hydrochloric acid is treated with ice cold solution of sodium nitrite, it gives:
  • benzene diazonium chloride
  • chlorobenzene
  • nitro Aniline
  • chloro Aniline
Butanamine-1 structure is shown as:
The first organic compound synthesized in the laboratory from an inorganic compound is:
  • $$NH_{4}NCO$$
  • $$NH_{2}-CO-NH_{2}$$
  • $$CH_{3}COOH$$
  • $$CH_{4}$$
Which one of the following is a primary amine?
  • $$CH_3-CH_2-CH_2-NH-CH_3$$
  • $$CH_3-H_2C-\!\!\!\!\!\!\!\!\!\!\!\!\!\underset{H}{\underset{|}{\overset{\quad \quad \,\,CH_2CH_3}{\overset{|}{C}}}}\!\!\!\!\!\!\!\!\!\!\!\!\!-NH_2$$
  • $$CH_3H_2C-\!\!\!\!\!\!\!\!\!\!\!\!\!\underset{H}{\underset{|}{\overset{\quad \quad \,\,CH_2CH_3}{\overset{|}{C}}}}\!\!\!\!\!\!\!\!\!\!\!\!\!-NH-CH_3$$
Correct gradation of basic character :
  • $$NH_{3} > CH_{3}NH_{2} >NF_{3}$$
  • $$ CH_{3}NH_{2} >NH_{3} >NF_{3}$$
  • $$ NF_{3} >CH_{3}NH_{2} >NH_{3}$$
  • $$ CH_{3}NH_{2} >NF_{3} >NH_{3}$$
Among the following isomeric $$C_{4} H_{11}N$$ amines, one having the lowest boiling point is:
Assertion : Benzylamine is more basic than aniline.
Reason : $$NH_{2}$$ group is electron releasing group.
  • Assertion and Reason are true and Reason is the correct explanation of Assertion
  • Assertion and Reason are true and Reason is not the correct explanation of Assertion
  • Assertion is true Reason is false
  • Assertion is false Reason is true
In the diazotization of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to :
  • supress the concentration of free aniline available for coupling
  • supress hydrolysis of phenol
  • ensure a stoichiometric amount of nitrous acid
  • neutralise the base liberated
The correct decreasing order of strength of the bases $$OH^{-}$$,$${NH_{2}}^{-}$$, $$HC\equiv C^{-}$$ and $${CH_{3}-CH_{2}}^{-}$$ is:
  • $${CH_{3}-CH_{2}}^{-} >{NH_{2}}^{-} > H-C \equiv C^{-} >OH^{-}$$
  • $$H-C\equiv C^{-} >{CH_{3}-CH_{2}}^{-} >{NH_{2}}^{-} >OH^{-}$$
  • $$OH^{-} > {NH_{2}}^{-} >H-C\equiv C^{-} >{CH_{3}-CH_{2}}^{-}$$
  • $${NH_{2}}^{-} > H-C\equiv C^{-} >OH^{-} >{CH_{3}-CH_{2}}^{-}$$
Which of the following would not react with benzene sulphonyl chloride in aq. $$NaOH$$ ? 
  • Aniline
  • Methylamine
  • $$N,N$$-dimethyl aniline
  • $$N-$$methyl aniline
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