CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 2 - MCQExams.com

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?
  • $$CH_{3}CH_{2}NH_{2}$$
  • $$(CH_{3}CH_{2})_{2}NH$$
What is the decreasing order of strengths of the following bases?
 $$\overset { \circleddash  }{ O } H,  N{ H }_{ 2 }^{ \circleddash  },  HC\equiv { C }^{ \circleddash  }$$ and $$C{ H }_{ 3 } - C{ H }_{ 2 }^{ \circleddash }$$
  • $$C{ H }_{ 3 } -C{ H }_{ 2 }^{ \circleddash } > N{ H }_{ 2 }^{ \circleddash } > H - C\equiv { C }^{ \circleddash } > \overset { \circleddash }{ O } H$$
  • $$H -C\equiv { C }^{ \circleddash } > C{ H }_{ 3 } -C{ H }_{ 2 }^{ \circleddash } > N{ H }_{ 2 }^{ \circleddash }>\overset { \circleddash }{ O } H$$
  • $$\overset { \circleddash }{ O } H > N{ H }_{ 2 }^{ \circleddash } > H - C\equiv { C }^{ \circleddash } > C{ H }_{ 3 } -C{ H }_{ 2 }^{ \circleddash }$$
  • $$N{ H }_{ 2 }^{ \circleddash } > H -C\equiv { C }^{ \circleddash } > \overset { \circleddash }{ O } H > C{ H }_{ 3 } -C{ H }_{ 2 }^{ \circleddash }$$
What is the product $$A$$?
136945_60101b8cd0c14cfab33aaf01696f71d3.png
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).
Give the decreasing order of basic strength of the following:
a.  $$N{H}_{3}$$
b.  $$N{H}_{2}OH$$
c.  $$N{H}_{2}-N{H}_{2}$$
  • $$c > b > a$$
  • $$a > b > c$$
  • $$c > a > b$$
  • $$a > c > b$$
Which one of the following on reduction with
lithium aluminium hydride yield a secondary
amine:
  • Methyl Cyanide
  • Nitroethane
  • Methylisocyanide
  • Acetamide
Indicate the following compound as $$1^o, 2^o$$ and $$3^o$$.

$$Et_3N$$
  • $$1^o$$
  • $$2^o$$
  • $$3^o$$
  • Non of the above
Which of the following is most basic?
  • Diphenylamine
  • Triphenylamine
  • p-Nitroaniline
  • Benzylamine
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
  • $$ 2 > 3 > 1 > N{H}_{3}$$
  • $$ 2 > 1 > 3 > N{H}_{3}$$
  • $$ 3 > 2 > 1 > N{H}_{3}$$
  • $$ N{H}_{3} > 1 > 2 > 3$$
Which of the following cannot be prepared by Gabriel phthalimide synthesis?
  • Aliphatic primary amines
  • Aromatic primary amines
  • Cyclic primary amines
  • None of the above
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
  • $$N{H}_{3} > 1 > 2 > 3$$
  • $$3 > 2 > 1 > N{H}_{3}$$
  • $$1 > 2 > N{H}_{3} > 3 $$
  • $$1 > N{H}_{3} > 2 > 3 $$
Consider the Hofmann ammonolysis reaction:
For any value of $$R$$, the correct order of basic character of the above amines in gaseous phase of nonpolar solvent is :

245879_92d857a1670c4482a6fc2f29bb96c72f.png
  • $$ 3 > 2 > N{H}_{3} > 1 $$
  • $$3 > 2 > 1 > N{H}_{3}$$
  • $$2 > 3 > N{H}_{3} > 1 $$
  • $$1 > 2 > 3 > N{H}_{3}$$
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
  • $$ 3 > 2 > 1 > N{H}_{3}$$
  • $$N{H}_{3} > 1 > 2 > 3$$
  • $$1 > 2 > N{H}_{3} > 3$$
  • $$1 > N{H}_{3} > 2 > 3$$
Which of the following statements are correct? 
  • The extent of H-bonding is greater in $$1^0$$ than $$2^0$$ and $$3^0$$ amines.
  • The boiling points of isomeric amines are in the order:$$ 1^0 > 2^0 > 3^0$$.
  • The boiling points of
  • The boiling points of $$\displaystyle (I){ C }_{ 4 }{ H }_{ 9 }{ NH }_{ 2 }>(II){ Me }_{ 2 }N-Et>(III)({ C }_{ 2 }{ H }_{ 5 }{ ) }_{ 2 }NH$$.
 The conjugate base of $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ NH }_{ 2 }^{ \oplus  }$$ is: 
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 3 }N$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }NH$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ N }^{ \ominus }$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ N }^{ \oplus }$$
Mendius reaction involves the: 
  • Reduction of aldehydes to give alcohols
  • Reduction of nitriles with sodium and ethanol
  • Oxidation of nitriles
  • Hydrolysis of cyanides
(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 statements is correct? 
  • Methyl amine is slightly acidic.
  • Methyl amine is less basic than ammonia.
  • Methyl amine is less basic than dimethyl amine.
  • Methyl amine is less basic than aniline.
Diazo coupling is useful to prepare some:
  • pesticides
  • dyes
  • proteins
  • vitamins
Among the following, the strongest base is: 
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\displaystyle p-{ NO }_{ 2 }{ C }_{ 6 }{ H }_{ 4 }{ NH }_{ 2 }$$
  • $$\displaystyle m-{ NO }_{ 2 }{ C }_{ 6 }{ H }_{ 4 }{ NH }_{ 2 }$$
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }{ NH }_{ 2 }$$
Which one of the following is the strongest base in aqueous medium :
  • $$(C_2H_5)_3N$$
  • $$C_2H_5NH_2$$
  • $$NH_3$$
  • $$(C_2H_5)_2NH$$
Which of the following amines will form stable diazonium salt at 273-283 K? 
  • $$\displaystyle { C }_{ 2 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }{ NH }_{ 2 }$$
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ N\left( { CH }_{ 3 } \right) }_{ 2 }$$
Which of the above is more acidic?
256253_6662372a512543bebab0cb2031ccfe82.png
  • I
  • II
  • Both have similar acidity
  • None of the above
Arrange the following in correct activating order towards EAS.
$$-\underset{I}{NHCOCH_3} \quad - O - \underset{II}{\overset{O}{\overset{||}{C}}} - CH_3 \quad - \underset{III}{\overset{\!\!\!\!\!+}{NR_3}}\quad  - \underset{IV}{NH_2}$$
  • $$III<IV<I<II$$
  • $$IV<I<II<III$$
  • $$I<II<III<IV$$
  • $$II<III<I<IV$$
Which one is more basic, $$CH_3NH_2 \,\, or \,\, CF_3NH_2$$?
  • $$CH_3NH_2$$
  • $$CF_3NH_2$$
  • Both have similar basicity
  • None of the above
Phenyl cyanide on reduction with $$Na/{C}_{2}{H}_{5}OH$$ yields :
  • $${C}_{6}{H}_{5}{CH}_{2}{NH}_{2}$$
  • $${C}_{6}{H}_{5}NH{CH}_{3}$$
  • $${C}_{6}{H}_{5}{NH}_{2}$$
Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:
  • diphenyl ether
  • p-hydroxy azobenzene
  • chlorobenzene
  • benzene
Tertiary butyl amine is a:
  • $${1}^{o}$$ amine
  • $${2}^{o}$$ amine
  • $${3}^{o}$$ amine
  • quaternary salt

The following amine is:

264396_1d957cbc4f5f409c8a3921be2788d98f.png
  • strongly acidic
  • weakly acidic
  • strongly basic
  • weakly basic
How many primary amines can be formulated by $${C}_{3}{H}_{9}N$$ and how many $${1}^{o}$$ hydrogen are associated with carbon atoms of each compound?
  • Two primary amines $$[3,6]$$
  • One primary amine $$[3]$$
  • Three primary amines $$[3,6,6]$$
  • Two primary amines $$[5,6]$$
Methyl cyanide on reaction with sodium and $${C}_{2}{H}_{5}OH$$ forms:
  • ethyl amine
  • ethanoic acid
  • ethanimine
  • none of these

Basic strength order:

290561_892b105a3ea74e169a8acd2ece1b1316.png
  • I > III > II
  • III > II > I
  • I > II > III
  • III > I > II
Pyridine is less basic than triethylamine because :
  • Pyridine has aromatic character
  • Nitrogen in pyridine is $$sp^2$$ hybridised
  • Pyridine is a cyclic system
  • In pyridine, lone pair of nitrogen is delocalised
Arrange the following in increasing order of pH value
305225_175826c898834c289f39f39c861665a6.png
  • II < I < III
  • III < I < II
  • III < II < I
  • II < III < I
Write the basicity order of the following. 
305233_0cb19f9179a6448d8331ef3c9b3519e0.png
  • (II) > (I) > (III) > (IV)
  • (I) > (III) > (II) > (IV)
  • (III) > (I) > (II) > (IV)
  • (I) > (II) > (III) > (IV)
How many primary amines are possible for the formula $$C_4H_{11}N$$ ?
  • One
  • Two
  • Three
  • Four
Which of the following group will decrease the basicity of aniline when attached to its para position?
  • $$-OH$$
  • $$-OC{H}_{3}$$
  • $$-C{H}_{3}$$
  • $$-N{O}_{2}$$
Which of the following is more basic than aniline?
  • p-nitroaniline
  • Benzyl amine
  • Diphenyl amine
  • Triphenyl amine
Acetonitrile on reduction gives:
  • propanamine
  • methanamine
  • ethanamine
  • none of these
Among the following substituted pyridines, the most basic compound is:
Which of the following method(s) does work for the preparation of secondary amine?
  • $$R_3N \xrightarrow[\begin{matrix} (ii) H_3O^+\\(iii) \Delta\end{matrix}]{(i) Br-CN}?$$
  • $$R-\overset{O}{\overset{||}{C}}-NH - R' \xrightarrow{LiAlH_2}?$$
  • $$\displaystyle RNC\xrightarrow[\Delta ]{Nl/H_{2}}?$$
  • All of these
Arrange the following in the decreasing order of boiling point: 
i) $${ C }_{ 2 }{ H }_{ 5}OH$$
ii) $$ (CH_3)_2NH $$
iii) $$C_2H_5NH_2$$
  • i > ii > iii
  • ii > i > iii
  • iii > i > ii
  • iii > ii > i
Arrange the following in the increasing order of boiling point: 

(i)$$C_2H_5OH$$  

(ii)$${(CH_3)_2}NH$$

(iii)$$C_2H_5NH_2$$
  • i < ii < iii
  • ii < i < iii
  • iii < i < ii
  • iii < ii < i
Arrange the following in the decreasing order of solubility in water :

i) $$ \displaystyle { C}_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$

ii) $$ ({ C }_{ 2 }{ H }_{5 }{ ) }_{ 2 }NH $$

iii) $$ { C }_{ 2 }{ H }_{ 5}{ NH }_{ 2 } $$
  • i > ii > iii
  • ii > i > iii
  • iii > i > ii
  • iii > ii > i
Which of the following is the most stable diazonium salt?
  • $$C_6H_5CH_2N_2^+X^-$$
  • $$CH_3N_2^+X^-$$
  • $$CH_3CH_2N_2^+X^-$$
  • $$C_6H_5N_2^+X^-$$
Arrange the following in the increasing order of solubility in water:

i) $$ \displaystyle { C}_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$

ii) $$ ({ C }_{ 2 }{ H }_{5 }{ ) }_{ 2 }NH $$

iii) $$ { C }_{ 2 }{ H }_{ 5}{ NH }_{ 2 } $$
  • i < ii < iii
  • ii < i < iii
  • iii < i < ii
  • iii < ii < i
How many primary amines are possible with the formula $$\displaystyle { C }_{ 4 }{ H }_{ 11 }N$$?
  • 1
  • 2
  • 3
  • 4
Gabriel phthalimide reaction is used for the preparation of :
  • Primary aromatic amines
  • Secondary amines
  • Primary aliphatic amines
  • Tertiary amines
Methyl amine reacts with methyl iodide. For completion of reaction, how many moles of methyl iodide are required?
  • 1
  • 2
  • 3
  • 4
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