A LevelChemistryOCRExam Questions6. Organic Chemistry & Analysis (A Level Only)6.6 Polymers

Polymers (OCR A Level Chemistry)

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6.6 Polymers

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6.6 Polymers

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11 mark

Which pair of compounds will not form a condensation polymer?

  • A dicarboxylic acid and a diamine

  • An amino acid and a carboxylic acid

  • A dicarboxylic acid and a diol

  • Two amino acids

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21 mark

The structure below shows the repeating pattern of a polymer.

7-6-q-2-mcq-al-chem

Which pair of compounds could react rapidly to form this polymer?

  • Butane-1,4-diol and propanedioic acid

  • Propane-1,3-diol and butanedioic acid

  • Butanoyl chloride and propane-1,3-diol

  • Propane-1,3-diol and butanedioyl dichloride

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31 mark

Which compound can form a condensation polymer by itself?

  • HOOCCH2CH2COOH

  • NH2C6H4NH2

  • COCl CH2NH2

  • CH2OHCH2COOCH2OH

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41 mark

What are the products of the alkaline hydrolysis of a polyester?

  • Dicarboxylic acids and compounds with 2 ammonium ion groups

  • Dicarboxylic acid salts and diamines

  • Diols and dicarboxylic acids 

  • Diols and dicarboxylic acid salts

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51 mark

The structure below shows the repeating pattern of a polymer.

addition-polymer

Which pair of compounds could react to form this polymer?

  • CH2OHCF(CF3)OH and HOOCCF2CF2COOH

  • CH2CFCF3 and C2F4 

  • CH3C(CF3)HF and CF2CF2

  • CF3CFCF2 and CF2HCH3

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11 mark

The repeating unit of a polymer is shown.

7270399e-3b3b-4e26-a2af-206c1cc667d4Which monomer or pair of monomers could be used to make this polymer?

  • Benzene-1,4-dicarboxylic acid and benzene-1,3-diamine

  • Benzene-1,4-dicarboxylic acid only

  • Benzene-1,4-dicarboxylic acid and benzene-1,4-diamine

  • Benzene-1,3-dicarboxylic acid and benzene-1,4-diamine

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21 mark

The repeating unit of a polyester is shown.

8fa56a6e-20ae-49b4-9187-07d4122afbfd

Plastics made from this polyester only soften at high temperatures. Which statement correctly explains the reason for this?

  • The polymer chains contain strong carbon-carbon bonds

  • The polymer chains contain hydrogen bonding and London dispersion forces between them

  • The polymer chains contain permanent dipole-dipole forces and London dispersion forces between them

  • The polymer chains contain strong carbon-oxygen bonds

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31 mark

Which polymer is most likely to biodegrade in landfill after several years?

  • PVC

  • Polyethene

  • Teflon

  • Nylon

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41 mark

Part of the Kevlar ® polymer chain is shown. fbc90a12-fad4-49c4-b0b6-e6ef46c2c67f

Which monomer or pair of monomers could be used to make Kevlar ®?

  • Benzoic anhydride and 1,4-diaminobenzene

  • 1,4-benzenedicarbonyl dichloride and 1,4-diaminobenzene

  • Benzene-1,4-dicarboxylic acid and 4-aminobenzoic acid

  • 4-aminobenzoic acid only

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51 mark

The structure of the polymer PGLA is shown below:

ocr-a2-6-6-q5-plga

Which of the following compounds will be formed from the acid hydrolysis of PLGA?

  • 2-hydroxypropanoic acid 

  • 1-hydroxypropanoic acid 

  • Ethanoic acid 

  • Propanoic acid 

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11 mark

What is the empirical formula of a four-carbon molecule that forms a polymer with ClOC(CH2)8COCl?

  • C2H6N

  • C2H3O

  • C4H9ON

  • C4H9O2N

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21 mark

Which polymer exhibits the strongest type of intermolecular force?

  • PET

  • PVC

  • Kevlar

  • Poly(propene)

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31 mark

Polymers can be hydrolysed in acidic or alkaline conditions.

Which row is correct?

 

Molecule

Hydrolysis reaction

Product(s)

A

Polyester

Alkaline

Diacyl chloride and diol

B

Polyalkene

Alkaline

Hydroxycarboxylic acid

C

Polyamide

Acid

Diamine and dicarboxylic acid salt

D

Protein

Acid

Protonated 2-aminocarboxylic acid

 

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    41 mark

    Which statement about polymers is correct?

    • Polyesters have higher melting points than polyamides.

    • The monomer hydroxyethanoic acid has a higher melting point than aminoethanoic acid. 

    • Polyamides are suitable to make fibres for sewing but polyalkenes are not. 

    • Polyalkenes form hydroxycarboxylic acids when hydrolysed in HCl.

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    51 mark

    The following is a section of the primary structure of a protein. This section was added to 6 mol dm-3 hydrochloric acid and was heated to 110 oC for 24 hours. 

    Gly - Ala - Ser - Leu - Asp

    How many heterodimeric dipeptides could be formed from the reaction products?

    • 4

    • 10

    • 20

    • 25

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