CBSE Questions for Class 12 Medical Chemistry Organic Compounds Containing Nitrogen Quiz 2 - MCQExams.com
  • 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 of the following effects of $$-NO_{2}$$ group operates on $$-NH_{2}$$ group in this molecule?
761081_9ada97986a6949c5b661831799ec8ef7.png
  • Only $$+M$$ effect
  • Only $$-M$$ effect
  • Both $$-l$$ and $$-M$$ effect
  • Only $$-l$$ effect
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
Which of the following is a $${ 1 }^o$$ amine? 
  • $$\left( { CH }_{ 3 } \right) _{ 3 }{ CNH }_{ 2 }$$
  • $${ C }_{ 6 }{ H }_{ 5 }{ NHCH }_{ 3 }$$
  • $${ CH }_{ 3 }NHCH\left( { CH }_{ 3 } \right) _{ 2 }$$
  • $$\left( { CH }_{ 3 }{ CH }_{ 2 } \right) _{ 2 }NCH_{ 3 }$$
$$-{ NH }_{ 2 }$$ 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.
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
$${ C }_{ 3 }{ H }_{ 9 }N$$ cannot represent:
  • $${ 1 }^{ 0 }$$ amine
  • $${ 2 }^{ 0 }$$ amine
  • $${ 3 }^{ 0 }$$ amine
  • quaternary salt
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
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 of the following amines form unstable diazonium salt?
  • $${ C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\left( { C }_{ 2 }{ H }_{ 5 } \right) _{ 2 }NH$$
  • $$\left( { C }_{ 2 }{ H }_{ 5 } \right) _{ 3 }N$$
  • $${ CH }_{ 3 }{ NHC }_{ 2 }{ H }_{ 5 }$$
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
Correct gradation of basic character :
  • $$NH_{3} > CH_{3}NH_{2} >NF_{3}$$
  • $$ CH_{3}NH_{2} >NH_{3} >NF_{3}$$
  • $$ NF_{3} >CH_{3}NH_{2} >NH_{3}$$
  • $$ CH_{3}NH_{2} >NF_{3} >NH_{3}$$
Aniline when treated with $$NaNO_{ 2 }$$ and $$HCl$$ at $$0- { 5 }^{ 0 }C$$ gives ____________ as a product.
  • chloroaniline
  • benzene diazonium chloride
  • chlorobenzene
  • dichlorobenzene
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 structural formula of methylamino methane is:
  • $$(CH_{3})_{2}CHNH_{2}$$
  • $$(CH_{3})_{3}N$$
  • $$(CH_{3})_{2}NH$$
  • $$CH_{3}NH_{2}$$
What is the product $$A$$?
136945_60101b8cd0c14cfab33aaf01696f71d3.png
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
The correct decreasing order of strength of the bases $$OH^{-}$$,$${NH_{2}}^{-}$$, $$HC\equiv C^{-}$$ and $${CH_{3}-CH_{2}}^{-}$$ is:
  • $${CH_{3}-CH_{2}}^{-} >{NH_{2}}^{-} > H-C \equiv C^{-} >OH^{-}$$
  • $$H-C\equiv C^{-} >{CH_{3}-CH_{2}}^{-} >{NH_{2}}^{-} >OH^{-}$$
  • $$OH^{-} > {NH_{2}}^{-} >H-C\equiv C^{-} >{CH_{3}-CH_{2}}^{-}$$
  • $${NH_{2}}^{-} > H-C\equiv C^{-} >OH^{-} >{CH_{3}-CH_{2}}^{-}$$
When aniline in hydrochloric acid is treated with ice cold solution of sodium nitrite, it gives:
  • benzene diazonium chloride
  • chlorobenzene
  • nitro Aniline
  • chloro Aniline
Which of the following would not react with benzene sulphonyl chloride in aq. $$NaOH$$ ? 
  • Aniline
  • Methylamine
  • $$N,N$$-dimethyl aniline
  • $$N-$$methyl aniline
Butanamine-1 structure is shown as:
An organic compound $$(C_{3}H_{9}N)$$ (A), when treated with nitrous acid, gave an alcohol and $$N_{2}$$ gas was evolved.
The compound (A) on warming with $$CHCl_{3}$$ and alcoholic caustic potash  gave (C), which on reduction gave isopropylmethylamine.
Predict the structure of (A).
Which one of the following is a primary amine?
  • $$CH_3-CH_2-CH_2-NH-CH_3$$
  • $$CH_3-H_2C-\!\!\!\!\!\!\!\!\!\!\!\!\!\underset{H}{\underset{|}{\overset{\quad \quad \,\,CH_2CH_3}{\overset{|}{C}}}}\!\!\!\!\!\!\!\!\!\!\!\!\!-NH_2$$
  • $$CH_3H_2C-\!\!\!\!\!\!\!\!\!\!\!\!\!\underset{H}{\underset{|}{\overset{\quad \quad \,\,CH_2CH_3}{\overset{|}{C}}}}\!\!\!\!\!\!\!\!\!\!\!\!\!-NH-CH_3$$
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
Which of the following compounds is most basic?
Which one of the following on reduction with
lithium aluminium hydride yield a secondary
amine:
  • Methyl Cyanide
  • Nitroethane
  • Methylisocyanide
  • Acetamide
Which of the following statements about primary amines is false?
  • Alkyl amines are stronger bases than aryl amines
  • Alkyl amines react with nitrous acid to produce alcohols
  • Aryl amines react with nitrous acid to produce phenols
  • Alkyl amines are stronger bases than ammonia
Which of the following has maximum $$pK_{b}$$ value?
  • $$CH_{3}CH_{2}NH_{2}$$
  • $$(CH_{3}CH_{2})_{2}NH$$
Which of the following is most basic?
  • Diphenylamine
  • Triphenylamine
  • p-Nitroaniline
  • Benzylamine
Aromatic amines are insoluble in water because:
  • Due to the larger hydrocarbon part which tends to retard the formation of H-bonds.
  • Due to the larger hydrocarbon part which tends to retard the formation of H-Nbonds.
  • Due to the larger hydrocarbon part which tends to retard the formation of H-Cbonds.
  • none of these
Consider the Hofmann ammonolysis reaction:
If $$R = {C}_{2}{H}_{5}$$, the correct order of basic character of the above amines in aqueous medium is :

245868_66584f09e3d349d09b7928e3f09d8c67.png
  • $$ 2 > 3 > 1 > N{H}_{3}$$
  • $$ 2 > 1 > 3 > N{H}_{3}$$
  • $$ 3 > 2 > 1 > N{H}_{3}$$
  • $$ N{H}_{3} > 1 > 2 > 3$$
Give the decreasing order of basic strength of the following:
a.  $$N{H}_{3}$$
b.  $$N{H}_{2}OH$$
c.  $$N{H}_{2}-N{H}_{2}$$
  • $$c > b > a$$
  • $$a > b > c$$
  • $$c > a > b$$
  • $$a > c > b$$
Consider the Hofmann ammonolysis reaction:
If $$R = {Me}_{3}C-$$ ($$t-butyl$$), the correct order of basic character of the above amines in aqueous medium is :

245876_0a0130f89d91465ead323cca1dfcd053.png
  • $$N{H}_{3} > 1 > 2 > 3$$
  • $$3 > 2 > 1 > N{H}_{3}$$
  • $$1 > 2 > N{H}_{3} > 3 $$
  • $$1 > N{H}_{3} > 2 > 3 $$
Indicate the following compound as $$1^o, 2^o$$ and $$3^o$$.

$$Et_3N$$
  • $$1^o$$
  • $$2^o$$
  • $$3^o$$
  • Non of the above
Consider the Hofmann ammonolysis reaction:
If $$R = {Me}_{2}CH-$$ (isopropyl), the correct order of basic character of the above amines in aqueous medium is :

245872_9c0c59beb5124a949e9afd4aa69fd0ed.png
  • $$ 3 > 2 > 1 > N{H}_{3}$$
  • $$N{H}_{3} > 1 > 2 > 3$$
  • $$1 > 2 > N{H}_{3} > 3$$
  • $$1 > N{H}_{3} > 2 > 3$$
Mendius reaction involves the: 
  • Reduction of aldehydes to give alcohols
  • Reduction of nitriles with sodium and ethanol
  • Oxidation of nitriles
  • Hydrolysis of cyanides
Which of the following statements are correct? 
  • In gas phase, the basic character of amine is 3 > 2 > 1. Due to the +1effect of (R-), the availability of $$\displaystyle LP$$$$\displaystyle \overset { - }{ e } 's$$ on N increases.
  • In aqueous medium, the basic character of amines is $$\displaystyle { Me }_{ 2 }NH>{ Me }_{ 3 }N>{ MeNH }_{ 2 }>{ NH }_{ 3 }$$.
  • In aqueous medium, the addition of protons increases crowding and thus strains setup, which being the highest in 3 amine decreases its basic character.
  • In aqueous medium, the ammonium ions in solution are stabilised not only by alkyl groups but also by H-bond donation to the solvent.
(A) is subjected to reduction with $$\displaystyle Zn-{ Hg }/{ HCl }$$ and the product formed is N-methylmethanamine. (A) can be: 
  • Ethane nitrile
  • Nitroethane
  • Carbylaminoethane
  • Carbylaminomethane
Which of the following cannot be prepared by Gabriel phthalimide synthesis?
  • Aliphatic primary amines
  • Aromatic primary amines
  • Cyclic primary amines
  • None of the above
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