Question 1

Which piece of apparatus is normally used in solvent extraction?

  A  

Büchner funnel

  B  

evaporating basin

  C  

Liebig condenser

  D  

separating funnel

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Question 2

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.

  A  

steam distilling, extracting with ether, distilling off the ether

  B  

refluxing, extracting with ether, distilling off the ether

  C  

filtering, refluxing, extracting with ether

  D  

steam distilling, filtering, extracting with ether

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Question 3

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

  A  

add NaOH(aq), isolate the organic product, add acidified K2Cr2O7 and boil under reflux

  B  

add NaOH(aq), isolate the organic product, add H2SO4(aq) and boil under reflux

  C  

heat with HCN in ethanol, isolate the organic product, add H2SO4(aq) and boil under reflux

  D  

heat with KCN in ethanol, isolate the organic product, add H2SO4(aq) and boil under reflux

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Question 4

What is true of every nucleophile?

  A  

it attacks a double bond

  B  

it donates a lone pair of electrons

  C  

it is a single atom

  D  

it is negatively charged

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Question 5

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

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

  A  

C2H4 + Br2 ➔ C2H4Br2

  B  

C2H4 + H2O ➔ CH3CH2OH

  C  

CH3CH2OH ➔ C2H4 + H2O

  D  

CH3CH2OH + HBr ➔ CH3CH2Br + H2O

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Question 6

Which organic reaction is an example of nucleophilic substitution?

  A  

CH3CH2Br + NaOH ➔ CH2CH2 + H2O + NaBr

  B  

CH3CH2Br + NaOH ➔ CH3CH2OH + NaBr

  C  

CH2CH2 + HCl ➔ C2H5Cl

  D  

C2H6 + Cl2 ➔ C2H5Cl + HCl

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Question 7

Which reaction will not give bromoethane as a product?

  A  

ethane with bromine in ultraviolet radiation

  B  

ethene with bromine at room temperature and pressure

  C  

ethene with hydrogen bromide at room temperature and pressure

  D  

ethanol with sodium bromide and concentrated sulfuric acid, heated under reflux

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Question 8

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

  A  

reduction of CH3CH2CH2CH2CHO

  B  

treatment of CH2=CHCH2CH2CH3 with conc. sulfuric acid followed by water

  C  

heating CH3CH2CH2CH=CH2 with steam and phosphoric acid under pressure


  D  

treatment of CH3CH=CHCH2CH3 with conc. sulfuric acid followed by water

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Question 9

What are the correct reagents for the conversion below?

CH3CH2CHOHCH3 ➔ CH3CH2CHBrCH3

  A  

Br2 and H2SO4

  B  

Br2 and NaOH

  C  

NaBr and H2SO4

  D  

NaBr and NaOH

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Question 10

Which statement about an electrophile is correct?

  A  

it is an electron pair acceptor

  B  

it is a proton donor

  C  

it is a negative ion

  D  

it is a species with an unpaired electron

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Question 11

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

Which drying agent is suitable?

  A  

calcium oxide

  B  

calcium sulfate

  C  

potassium hydroxide

  D  

potassium carbonate

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