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ASChemistryCIEExam Questions3. Organic Chemistry3.7 Nitrogen Compounds

Nitrogen Compounds (CIE AS Chemistry)

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3.7 Nitrogen Compounds

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3.7 Nitrogen Compounds

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11 mark

Which of the following is the displayed formula for ethylamine?

  • 3-7-e-1a

  • 3-7-e-1b

  • 3-7-e-1c

  • 3-7-e-1d

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21 mark

What type of reaction makes ethylamine from bromoethane?

  • Oxidation

  • Reduction

  • Nucleophilic substitution

  • Electrophilic substitution

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31 mark

CH3CH2Cl reacts with an excess of ethanolic NH3.

Which compound is the main organic product?

  • (CH3CH2)3N

  • (CH3CH2)2NH

  • CH3CH2NH2

  • (CH3CH2)4N+

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41 mark

Hydrolysis of CH3CH2CN with dilute HCl produces which compound?

  • CH3COOH

  • CH3CH2CH2NH3

  • CH3CH2COOH

  • CH3CH2COH

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51 mark

When 1-bromoethane reacts with an equal amount of X. What would X be and what is the product of this reaction?

 

X

Product

A

Ammonia

Amine

B

Methylamine

Amide

C

Water

Weak acid

D

Methanol

Ethyl methanoate

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    61 mark

    The equation shows a chemical reaction

    CH3CH2CHClCH3  +  CN–  rightwards arrow  CH3CH2CH(CH3)CN  +  Cl–

    What is the name for this type of reaction?

    • Nucleophilic substitution

    • Electrophilic substitution

    • Free radical substitution

    • Nucleophilic addition

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    71 mark

    What are the reagents needed in the reaction of 1-bromopropane to butanenitrile?

    • KCN

    • Ethanol and heat

    • KCN, ethanol and heat

    • KCN and ethanol

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    81 mark

    What are the products in the reaction of ethanenitrile and hydrochloric acid?

    • Propanoic acid and ammonia

    • Propanoic acid and ammonium chloride

    • Ethanoic acid and ammonia

    • Ethanoic acid and ammonium chloride

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    91 mark

    What are the products in the reaction of ethanenitrile and sodium hydroxide?

    • Sodium propanoate and ammonia

    • Sodium propanoate ammonium chloride

    • Sodium ethanoate and ammonia

    • Sodium ethanoate and ammonium chloride

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    101 mark

    Which one of the following reactants would not produce a nitrile in a one-step reaction?

    • Amides

    • Aldehydes

    • Halogenoalkanes

    • Alkanes

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    11 mark

    Methyl iodide can be heated with ammonia. Which of the options describes the products of this reaction?

    • Methylamine

    • Dimethylamine

    • Trimethylamine

    • All of the above

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    21 mark

    Which of the following reactions would produce 2-hydroxy-2-methylpropanenitrile?

    • Ethanal + Sulphuric acid

    • Propanone + Hydrogen cyanide

    • Ethanal + Ammonia

    • Propanone + Ammonia

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    31 mark

    Reactions were carried out to produce nitriles. Which combination of reactants and reagents is not correct?

     

    Reactant

    Reagent

    A

    Halogenoalkane

    Potassium cyanide and ethanol

    B

    Amide

    Phosphorus (V) oxide

    C

    Aldehyde

    Hydrogen cyanide

    D

    Ketone

    Ammonia

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      41 mark

      The following equations show reactions with nitrogen compounds. Which one correctly shows the hydrolysis of nitriles with dilute acid?

      • CH3CN + HCl + 2H2O  rightwards arrow  CH3COOH + NH3Cl

      • CH3CN + HCl + 2H2O  rightwards arrow  CH3COOH + NH4Cl

      • CH3CN + HCl + H2O    rightwards arrow  CH3COOH + NH4Cl

      • CH3CN + HCl + 2H2O  rightwards arrow  CH3COOHCl + NH3

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      51 mark

      The following equations show reactions with nitrogen compounds. Which one correctly shows the hydrolysis of nitriles with dilute sodium hydroxide?

      • CH3CN +  NaOH +  H2O   rightwards arrow CH3COONa +  NH3

      • CH3CN +  NaOH +  2H2O rightwards arrow CH3COONa +  NH3

      • CH3CN +  NaOH +  H2O   rightwards arrow CH3COONa +  NH4

      • CH3CN +  NaOH +  2H2O rightwards arrow CH3COONa +  NH4

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      11 mark

      What is the correct two-step synthesis to produce 2-hydroxybutanenitrile from propan-1-ol?

      • 1) NaCl / H2SO4
        2) NaCN / Ethanol

      • 1) NaCN / Ethanol
        2) NaCl / H2SO4

      • 1) NaCN (aq) / H+ (aq)
        2) K2Cr2O7 / H2SO4 under distillation

      • 1) K2Cr2O7 / H2SO4 under distillation;
        2) NaCN (aq) / H+ (aq)

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      21 mark

      Butanone can undergo addition when mixed with NaCN (aq) / H+ (aq), forming product Z. Product Z can then undergo hydrolysis when heated with dilute HCl, forming product Y.

      Which compound is product Y?

      • 2-hydroxypentanoic acid

      • 2-hydroxybutylamine

      • 2-methyl-2-hydroxybutanoic acid

      • 2-ethyl-2-hydroxypropylamine

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      31 mark

      What is the correct set of reagents and conditions for the two reactions shown?

       

      (CH3)2CO rightwards arrow (CH3)2CHCN

      CH3CHClCH3 rightwards arrow CH3CH(NH2)CH3

      A

      Sn / conc. H2SO4

      Dilute ethanolic NH3

      B

      Sn / conc. HCl

      Excess ethanolic NH3

      C

      NH3

      Nitric acid / 50 °C

      D

      KCN, H2SO4

      Excess ethanolic NH3

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        41 mark

        A student wanted to produce a hydroxynitrile. Which types of reactions, reactants and reagents are shown in the table would correctly describe this reaction?

         

        Type of reaction

        Reactants

        Reagents

        A

        Addition

        Aldehyde

        HCN

        B

        Hydrolysis

        Halogenoalkane

        Ethanolic NH3

        C

        Substitution

        Ketone

        HCN

        D

        Addition

        Halogenoalkane

        KCN, ethanol

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          51 mark

          What would X, Y and Z be in the following reaction sequence?

          CH subscript 3 CH subscript 2 CH subscript 2 Br space rightwards arrow with KCN space plus space ethanol space plus space heat on top space bold X space plus space KBr space rightwards arrow with NaOH space plus space straight H subscript 2 straight O space plus space heat on top space bold Y space plus space NH subscript 3 space rightwards arrow with dil space HCl on top space bold Z

           

          X

          Y

          Z

          A

          CH3CH2CH2K

          CH3CH2CH2COONa

          CH3CH2CH2COOH

          B

          CH3CH2CH2CN

          CH3CH2CH2COONa

          CH3CH2CH2COOH

          C

          CH3CH2CH2K

          CH3CH2CH2COOH

          CH3CH2CH2COONa

          D

          CH3CH2CH2CN

          CH3CH2CH2COOH

          CH3CH2CH2COONa

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