Organic synthesis multiple choice questions – A-Level Chemistry (Edexcel)

Organic Synthesis

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1 of 29

Pentanenitrile can be made by reaction of 1-bromobutane with potassium cyanide.

Which of these is the correct name for the mechanism of this reaction?

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2 of 29

A two-step preparation of propylamine is shown.

bromoethane ➔ X ➔ propylamine

What is X?

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3 of 29

Butan-1-ol can be made by reaction of 1-bromobutane with aqueous sodium hydroxide.

Which of these is the correct name for the mechanism of this reaction?

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4 of 29

Which piece of apparatus is normally used in solvent extraction?

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5 of 29

Cinnamaldehyde, C₆H₅CH=CHCHO, is a liquid that is slightly soluble in water but is much more soluble in ether. It decomposes below its boiling temperature.

It can be extracted from cinnamon. Sticks of cinnamon are ground up and mixed with water.

Select the correct order of practical techniques to obtain cinnamaldehyde from this mixture.

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6 of 29

If the starting material is iodoethane, which sequence of reactions will produce propanoic acid as the main final product in good yield?

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7 of 29

Many, but not all, organic reactions need to be heated before a reaction occurs.

Which reaction occurs quickly at room temperature, 20°C?

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8 of 29

Which organic reaction is an example of nucleophilic substitution?

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9 of 29

A student is required to dry a liquid sample of pentanoic acid.

Which drying agent is suitable?

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10 of 29

Which reaction will not give bromoethane as a product?

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11 of 29

Which reaction will give CH₃CH₂CH(OH)CH₂CH₃ as a product?

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12 of 29

What are the correct reagents for the conversion below?

CH₃CH₂CHOHCH₃ ➔ CH₃CH₂CHBrCH₃

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13 of 29

Which pair of compounds can bothbe separately hydrolysed in acidic conditions to form propanoic acid?

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14 of 29

Which set of reagents is not suitable for the step indicated?

Diagram showing an organic reaction pathway with multiple steps and reagents.

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15 of 29

Which reaction may be used to make a carboxylic acid in a single step?

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16 of 29

Cottonseed oil contains large amounts of polyunsaturated carboxylic acids. When this oil is used to make margarine, the C=C double bonds in the unsaturated carboxylic acids are hydrogenated.

What reagents and conditions would be suitable to bring about this hydrogenation reaction?

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17 of 29

Energy is released in the human body by the oxidation of glucose in a complex sequence of reactions. Part of this sequence is the Krebs cycle.

One reaction in the Krebs cycle is the conversion of fumaric acid into malic acid.

HO₂CCH=CHCO₂H ➔ HO₂CCH(OH)CH₂CO₂H

fumaric acid malic acid

Which reagents could achieve this transformation in the laboratory?

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18 of 29

The compound ‘leaf alcohol’ is partly responsible for the smell of new-mown grass.

CH₃CH₂CH=CHCH₂CH₂OH

leaf alcohol

What will be formed when ‘leaf alcohol’ is oxidised using an excess of hot, acidified K₂Cr₂O₇(aq)?

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19 of 29

Which pair of reagents will take part in a redox reaction?

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20 of 29

Which reaction would not give ethanoic acid?

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21 of 29

Which compound could be formed by a one-step reaction from 1-chloropropane?

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22 of 29

Which statement about the purification of a solid by recrystallisation is correct?

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23 of 29

Which substance cannotbe made in a single step from C₂H₄?

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24 of 29

Which compound does not react with nucleophiles?

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25 of 29

Which is the mechanism for this conversion?

Diagram showing the mechanism for converting a methyl group to a chloromethyl group on a benzene ring.

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26 of 29

What reagent reacts with propylmagnesium bromide to produce butanoic acid?

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27 of 29

What is the product of the reaction between propylmagnesium bromide and propanal?

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28 of 29

What is the product of the reaction between propylmagnesium bromide and butanone?

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29 of 29

Which organic compound reacts with a Grignard reagent to give a product that forms a secondary alcohol on hydrolysis?

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