CBSE Questions for Class 12 Engineering Chemistry Amines Quiz 3 - MCQExams.com

Acetonitrile $$\xrightarrow {  Hydrolysis  } $$ ?
  • Acetic acid
  • Propionic acid
  • Formic acid
  • None of these
Amine that cannot be prepared by Gabriel phthalimide synthesis is :
  • aniline
  • benzylamine
  • methylamine
  • iso-butylamine
Ethylamine is ?
  • $$\displaystyle { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }$$
  •  $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-OH$$
  • $$\displaystyle { CH }_{ 3 }-O-{ C }_{ 3 }{ H }_{ 7 }$$
  • $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-CH_3$$
  • $$\displaystyle CH_3 - CH_2- NH_2$$
 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 :
  • $$NH_{3} > CH_{3} NH_{2} > C_{2}H_{5}NH_{2} > C_{6}H_{5} NH_{2}$$
  • $$C_{2}H_{5}NH_{2} > CH_{3} NH_{2} > NH_{3} > C_{6}H_{5}NH_{2}$$
  • $$C_{6}H_{5}NH_{2} > C_{2}H_{5}NH_{2} > CH_{3}NH_{2} > NH_{3}$$
  • $$CH_{3} NH_{2} > C_{2}H_{5}NH_{2} > C_{6}H_{5}NH_{2} > NH_{3}$$
Structure containing an amine group is :
  • $$\displaystyle { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }$$
  •  $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-OH$$
  • $$\displaystyle { CH }_{ 3 }-O-{ C }_{ 3 }{ H }_{ 7 }$$
  • $$\displaystyle CH_3-\underset {\displaystyle \underset {\displaystyle O}{ ||}}{C}-CH_3$$
  •  $$\displaystyle CH_3 - CH_2- NH_2$$
Which compound is different from the others?
  • Methyl ethyl ketone
  • Pentan-2-one
  • 2-Pentanone
  • Methyl propyl ketone
Which compound is a secondary alcohol?
  • Butan-1-ol
  • Butan-2-ol
  • Isobutyl alcohol
  • 2-Methylpropan-2-ol
Alkyl and aryl amines are prepared using which of the following reducing agent.
  • $$LiAlH_4$$
  • $$H_2$$
  • $$NaBH_4$$
  • Both A and B
Which of the following is the product of the reaction?

552187_e4b2a3ff8c3f41ec8f2f62e767dd0b7c.png
  • $$C_6H_5CH_2NH_2$$
  • $$C_5H_5CH_2NH_2$$
  • $$C_6H_4CH_2NH_2$$
  • $$C_4H_5CH_2NH_2$$
The conversion of primary aromatic amines into diazonium salts is known as ___________.
  • decarboxylation
  • diazotization
  • ammonolysis
  • none of these
$$CH_3CH_2CH_2CN+LiAlH_4\rightarrow $$
Which of the following amine is formed in the above reaction :
  • $$CH_3CH_2CH_2CH_2NH_2$$
  • $$CH_3CH_2CH_2NH_2$$
  • $$CH_3CH_2NH_2$$
  • $$CH_3CH_2CH_2CH(NH_2)_2$$
Aromatic amines are generally:
  • pleasant in smell.
  • toxic in nature.
  • low melting solids.
  • none of these.
$$R-CN+2H_2\overset{Pd}{\rightarrow}R-CH_2NH_2$$ is :
  • Oxidation Reaction
  • Reduction reaction
  • Combustion
  • None
Identify the highest soluble amine from the following.
  • Primary amine
  • Secondary amine.
  • Tertiary amine
  • None of these
Which one of the amine have highest boiling point?
  • Primary amine
  • Secondary amine
  • Tertiary amine
  • all of these
Which of the folllowing catalysts are used in the preparation amines by the reduction of isonitriles:
  • Platinum
  • Palladium
  • Nickel
  • All of the above
Reduction of alkyl nitriles in presence of $$LiAlH_4$$ Gives :
  • Alkyl Amines
  • Alkyl Amides
  • Alkyl Nitro compounds
  • Alkyl Iso cyanides
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
The boiling point of amines are higher than that of hydrocarbon because:
  • they form inter molecular H-bonds
  • they are polar
  • they form ionic bonds
  • both A and B
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.
Based on the concept of the hydration of protonated amines, which of the following represents correct order of decreasing basic strength of amines?
  • primary amine $$>$$ secondary amine $$>$$ tertiary amine
  • tertiary amine $$>$$ primary amine $$>$$ secondary amine
  • tertiary amine $$>$$ secondary amine $$>$$ primary amine
  • primary amine $$>$$ tertiary amine $$>$$ secondary amine
Based on the combined effects of inductive effect and solvation, which of the following represents correct order of decreasing basic strength of amines?
  • Secondary amine $$>$$ Tertiary amine $$>$$ Primary amine
  • Primary amine $$>$$ Secondary amine $$>$$ Tertiary amine
  • Tertiary amine $$>$$ Secondary amine $$>$$ Primary amine
  • Primary amine $$>$$ Tertiary amine $$>$$ Secondary amine
$$C_6H_5CN + H_2/Ni \rightarrow$$?
  • $$C_6H_5-CH_2-CH_2-NH_2$$
  • $$C_6H_5-CH_2-NH_2$$
  • $$C_6H_6-CH_2-NH_2$$
  • $$C_6H_5-NH_2$$
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
Aniline is soluble in which of the following organic reagents?
  • Benzene
  • Ether
  • Alcohol
  • All of above
In aqueous solution ______ amines are unexpectedly less basic than the others.
  • Primary
  • Secondary
  • Primary and Secondary
  • Tertiary
In the preparation of primary amine by reduction of nitriles sodium amalgam can be used as reducing agent in presence of:
  • ethyl alcohol
  • methyl alcohol
  • both a and b
  • none of these
Which of the following represents the decreasing order of basic strength of amines in the gas phase?
  • Tertiary amine $$>$$ Secondary amine $$>$$ Primary amine
  • Tertiary amine $$>$$ Primary amine $$>$$ Secondary amine
  • Primary amine $$>$$ Secondary amine $$>$$ Tertiary amine
  • Secondary amine $$>$$ Tertiary amine $$>$$ Primary amine
Which of the following is the correct order of the boiling points?
  • Propane $$<$$ Ethylamine $$<$$ Ethyl alcohol
  • Ethylamine $$<$$ Propane $$<$$ Ethyl alcohol
  • Ethylamine $$<$$ Ethyl alcohol $$<$$ Propane
  • Propane $$<$$ Ethyl alcohol $$<$$ Ethylamine
The most basic compound in aqueous solution is:
  • $${ NH }_{ 3 }$$
  • $${ CH }_{ 3 }{ NH }_{ 2 }$$
  • $$HN{ \left( { CH }_{ 3 } \right) }_{ 2 }$$
  • $$N{ \left( { CH }_{ 3 } \right) }_{ 3 }$$
The stability of benzene diazonium salts is because of:
  • inductive effect
  • resonance
  • hyperconjugation
  • mesomeric effect
Which of the following amine gives diazonium salt on reaction with $$HNO_2?$$
  • $$(CH_3)_2NH$$
  • $$(CH_3)_3N$$
  • $$C_6H_5NH_2$$
  • $$CH_3NH_2$$
Which of the following represents the correct order of basic strength?.
  • aniline $$>$$ diphenylaniline $$>$$ triphenylaniline
  • triphenylaniline $$>$$ diphenylaniline $$>$$ aniline
  • triphenylaniline $$>$$ aniline $$>$$ diphenylaniline
  • aniline $$>$$ triphenylaniline $$>$$ diphenylaniline
The conversion of primary aromatic amines into diazonium salts is known as:
  • diazotisation
  • displacement
  • acylation
  • alkylation
Diazonium salts are used at a very lower temperature because:
  • they are poisonous at room temperature
  • they are highly unstable at room temperature
  • they are highly volatile at room temperature
  • none of these
What makes diazonium ion one of the best leaving group of organic chemistry? 
  • Half filled electronic configuration of nitrogen atom
  • High electronegativity of nitrogen atom
  • Very high stability of dinitrogen molecule in the atmosphere
  • Weaker $$C-N$$ bond
Which of the following is a true statement regarding the effect of substituent on the basic character of aromatic amines?
  • Electron donating groups like $$-OCH_3$$, $$-CH_3$$ increases the basic strength, while electron withdrawing groups like $$-NO_2$$, $$-SO_3$$, $$-COOH$$ etc. decrease the basic strength.
  • Electron donating groups like $$-OCH_3$$, $$-CH_3$$ decreases the basic strength, while electron withdrawing groups like $$-NO_2$$, $$-SO_3$$, $$-COOH$$ etc. increase the basic strength.
  • Electron donating groups like $$-OCH_3$$, $$-CN$$ increases the basic strength, while electron withdrawing groups like $$-NO_2$$, $$-SO_3$$, $$-COOH$$ etc. decrease the basic strength.
  • Electron donating groups like $$-OCH_3$$, $$-CH_3$$ increases the basic strength, while electron withdrawing groups like $$-NO_2$$, $$-SO_3$$, $$-COOH$$, $$-NH_2$$ etc. decrease the basic strength.
Which of the following is true statement?
  • Every o-substituted aniline (electron releasing or electron withdrawing) is less basic than aniline.
  • Every o-substituted aniline (electron releasing or electron withdrawing) is more basic than aniline.
  • o-substituted aniline (electron releasing) is less basic than aniline and

    o-substituted aniline (electron withdrawing) is more basic than aniline.
  • o-substituted aniline (electron releasing) is more basic than aniline and

    o-substituted aniline (electron withdrawing) is less basic than aniline.
This compound can be classified as:

601741_ea8c82ea2b284af5806e314c13d45df8.png
  • primary amine
  • secondary amine
  • tertiary amine
  • none of these
Which of the following will not undergo diazotisation ?
  • m-toluidine
  • Aniline
  • p-aminophenol
  • Benzyl amine
Which of the following amines yields foul smelling product with haloform and alcoholic $$KOH$$?
  • Ethylamine
  • Diethyl amine
  • Triethylamine
  • Ethyl methylamine
The molecule which does not exhibit strong hydrogen bonding is$$:$$
  • Methyl amine
  • Diethyl ether
  • Acetic acid
  • Glucose
Correct gradation of basic character is:
  • $$NH_3 > CH_3NH_2 > NF_3$$
  • $$CH_3NH_2 > NH_3 > NF_3$$
  • $$NF_3 > CH_3NH_2 > NH_3$$
  • $$CH_3NH_2 > NF_3 > NH_3$$
The product X and Y in the following reaction sequence are:
630790_9b235053bdc043249f26c0f0e93fa152.png
Which one of the following is strongly basic?
  • Dimethyl amine
  • Methyl amine
  • Ammonia
  • Aniline
The source of nitrogen in Gabriel synthesis of amines is:
  • sodium azide $$Na{ N }_{ 3 }$$
  • potassium phthalimide $${ C }_{ 6 }{ H }_{ 4 }{ \left( CO \right) }_{ 2 }{ N }^{ - }{ K }^{ + }$$
  • sodium cyanide
  • potassium nitrate
Select the basic strength order of following molecule.
692237_ac1c69864c6d47cb98a180f18cce8a5e.png
  • $$II > III > IV > I$$
  • $$II > IV > III > I$$
  • $$IV > II > III > I$$
  • $$IV > III > I > II$$
Which one of the following on reduction with lithiium aluminium hydride yield a secondary amine?
  • Nitroethane
  • Methyl isocyanide
  • Acetamide
  • Methyl cyanide
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