CBSE Questions for Class 12 Medical Chemistry Organic Compounds Containing Nitrogen Quiz 3 - MCQExams.com

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
  • $$ 3 > 2 > N{H}_{3} > 1 $$
  • $$3 > 2 > 1 > N{H}_{3}$$
  • $$2 > 3 > N{H}_{3} > 1 $$
  • $$1 > 2 > 3 > N{H}_{3}$$
 The conjugate base of $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ NH }_{ 2 }^{ \oplus  }$$ is: 
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 3 }N$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }NH$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ N }^{ \ominus }$$
  • $$\displaystyle ({ CH }_{ 3 }{ ) }_{ 2 }{ N }^{ \oplus }$$
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
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: 
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ NH }_{ 2 }$$
  • $$\displaystyle p-{ NO }_{ 2 }{ C }_{ 6 }{ H }_{ 4 }{ NH }_{ 2 }$$
  • $$\displaystyle m-{ NO }_{ 2 }{ C }_{ 6 }{ H }_{ 4 }{ NH }_{ 2 }$$
  • $$\displaystyle { C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }{ NH }_{ 2 }$$
Aniline is soluble in which of the following organic reagents?
  • Benzene
  • Ether
  • Alcohol
  • All of above
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.
$$-\underset{I}{NHCOCH_3} \quad - O - \underset{II}{\overset{O}{\overset{||}{C}}} - CH_3 \quad - \underset{III}{\overset{\!\!\!\!\!+}{NR_3}}\quad  - \underset{IV}{NH_2}$$
  • $$III<IV<I<II$$
  • $$IV<I<II<III$$
  • $$I<II<III<IV$$
  • $$II<III<I<IV$$
Arrange the following in increasing order of pH value
305225_175826c898834c289f39f39c861665a6.png
  • II < I < III
  • III < I < II
  • III < II < I
  • II < III < I
Phenyl cyanide on reduction with $$Na/{C}_{2}{H}_{5}OH$$ yields :
  • $${C}_{6}{H}_{5}{CH}_{2}{NH}_{2}$$
  • $${C}_{6}{H}_{5}NH{CH}_{3}$$
  • $${C}_{6}{H}_{5}{NH}_{2}$$
Tertiary butyl amine is a:
  • $${1}^{o}$$ amine
  • $${2}^{o}$$ amine
  • $${3}^{o}$$ amine
  • quaternary salt
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 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
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
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
Which one of the amine have highest boiling point?
  • Primary amine
  • Secondary amine
  • Tertiary amine
  • all of these
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
How many primary amines are possible for the formula $$C_4H_{11}N$$ ?
  • One
  • Two
  • Three
  • Four
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 more basic than aniline?
  • p-nitroaniline
  • Benzyl amine
  • Diphenyl amine
  • Triphenyl amine
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
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
Acetonitrile $$\xrightarrow {  Hydrolysis  } $$ ?
  • Acetic acid
  • Propionic acid
  • Formic acid
  • None of these
Acetonitrile on reduction gives:
  • propanamine
  • methanamine
  • ethanamine
  • none of these
Amine that cannot be prepared by Gabriel phthalimide synthesis is :
  • aniline
  • benzylamine
  • methylamine
  • iso-butylamine
 Primary amine $$(RNH_2)$$ reacts with nitrous acid to give :
  • $$RNH_3^+NO_2$$
  • ROH
  • ROR
  • None of these
The decreasing order of basic character of the three amines and ammonia is :
  • $$NH_{3} > CH_{3} NH_{2} > C_{2}H_{5}NH_{2} > C_{6}H_{5} NH_{2}$$
  • $$C_{2}H_{5}NH_{2} > CH_{3} NH_{2} > NH_{3} > C_{6}H_{5}NH_{2}$$
  • $$C_{6}H_{5}NH_{2} > C_{2}H_{5}NH_{2} > CH_{3}NH_{2} > NH_{3}$$
  • $$CH_{3} NH_{2} > C_{2}H_{5}NH_{2} > C_{6}H_{5}NH_{2} > NH_{3}$$
How many primary amines are possible with the formula $$\displaystyle { C }_{ 4 }{ H }_{ 11 }N$$?
  • 1
  • 2
  • 3
  • 4
Ethylamine is ?
  • $$\displaystyle { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }$$
  •  $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-OH$$
  • $$\displaystyle { CH }_{ 3 }-O-{ C }_{ 3 }{ H }_{ 7 }$$
  • $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-CH_3$$
  • $$\displaystyle CH_3 - CH_2- NH_2$$
The conversion of primary aromatic amines into diazonium salts is known as ___________.
  • decarboxylation
  • diazotization
  • ammonolysis
  • none of these
Structure containing an amine group is :
  • $$\displaystyle { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }$$
  •  $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-OH$$
  • $$\displaystyle { CH }_{ 3 }-O-{ C }_{ 3 }{ H }_{ 7 }$$
  • $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-CH_3$$
  •  $$\displaystyle CH_3 - CH_2- NH_2$$
$$CH_3CH_2CH_2CN+LiAlH_4\rightarrow $$
Which of the following amine is formed in the above reaction :
  • $$CH_3CH_2CH_2CH_2NH_2$$
  • $$CH_3CH_2CH_2NH_2$$
  • $$CH_3CH_2NH_2$$
  • $$CH_3CH_2CH_2CH(NH_2)_2$$
Which compound is different from the others?
  • Methyl ethyl ketone
  • Pentan-2-one
  • 2-Pentanone
  • Methyl propyl ketone
$$R-CN+2H_2\overset{Pd}{\rightarrow}R-CH_2NH_2$$ is :
  • Oxidation Reaction
  • Reduction reaction
  • Combustion
  • None
Which compound is a secondary alcohol?
  • Butan-1-ol
  • Butan-2-ol
  • Isobutyl alcohol
  • 2-Methylpropan-2-ol
Which of the folllowing catalysts are used in the preparation amines by the reduction of isonitriles:
  • Platinum
  • Palladium
  • Nickel
  • All of the above
Alkyl and aryl amines are prepared using which of the following reducing agent.
  • $$LiAlH_4$$
  • $$H_2$$
  • $$NaBH_4$$
  • Both A and B
Reduction of alkyl nitriles in presence of $$LiAlH_4$$ Gives :
  • Alkyl Amines
  • Alkyl Amides
  • Alkyl Nitro compounds
  • Alkyl Iso cyanides
Which of the following is the product of the reaction?

552187_e4b2a3ff8c3f41ec8f2f62e767dd0b7c.png
  • $$C_6H_5CH_2NH_2$$
  • $$C_5H_5CH_2NH_2$$
  • $$C_6H_4CH_2NH_2$$
  • $$C_4H_5CH_2NH_2$$
Amines are almost colourless but develop colour on keeping in the air for a long time, because:
  • they are readily oxidised in air to form coloured oxidation product.
  • they react with oxygen present in air in very less amount.
  • they regain color in presence of air.
  • none of these
Reduction of aryl nitriles in presence of $$LiAlH_4$$ Gives : 
  • Aryl nitro compounds
  • Aryl amines
  • Aryl iso cyanides
  • Alky amines
Which of the following is true?
  • Aliphatic amines are stronger bases than ammonia.
  • Aliphatic amines are weaker bases than ammonia.
  • Aliphatic amines ammonia have approximately same basic strength.
  • Low molecular weight aliphatic amines are stronger bases than ammonia.
Aromatic amines are generally:
  • pleasant in smell.
  • toxic in nature.
  • low melting solids.
  • none of these.
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