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Quiz Chapter 4: Polymer Chemistry

10 questions · Form 5 Chemistry Bab 4: Polymer Chemistry

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which monomer is used to produce polystyrene?

  1. Ethene
  2. Propene
  3. Phenylethene (Styrene)
  4. Tetrafluoroethene
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Answer: C

Polystyrene is synthesized through the addition polymerisation of phenylethene, commonly called styrene.

2. How does the structural arrangement of sulfur cross-links explain the high elasticity of vulcanised rubber?

  1. Cross-links allow polymer chains to slide past each other permanently
  2. Cross-links pull stretched polymer chains back to their original position when releasing force
  3. Cross-links break apart completely when force is applied and reform instantly
  4. Cross-links absorb heat from the surroundings during stretching
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Answer: B

Sulfur cross-links prevent polymer chains from permanently slipping past one another and pull chains back to their original positions once stretching forces stop.

3. Which chemical substance is added to latex to prevent premature natural coagulation during transport?

  1. Methanoic acid
  2. Ethanol
  3. Aqueous ammonia
  4. Sodium chloride solution
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Answer: C

Aqueous ammonia supplies OH⁻ ions that neutralise any H⁺ ions produced by bacterial action, preserving negative charges on the membranes to prevent coagulation.

4. What is the systematic IUPAC name for the monomer of natural rubber?

  1. 2-methylprop-1-ene
  2. 2-methylbuta-1,3-diene
  3. Buta-1,3-diene
  4. Chloroethene
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Answer: B

The monomer of natural rubber (isoprene) has the systematic IUPAC name 2-methylbuta-1,3-diene.

5. Which of the following is a naturally occurring polymer?

  1. Polythene
  2. Polyvinyl chloride
  3. Protein
  4. Nylon
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Answer: C

Protein is a natural polymer made up of amino acid monomers. Polythene, PVC, and Nylon are synthetic polymers.

6. What hazardous toxic gas is released when Polyvinyl chloride (PVC) waste is incinerated?

  1. Methane gas (CH₄)
  2. Hydrogen chloride gas (HCl)
  3. Ammonia gas (NH₃)
  4. Sulfur trioxide gas (SO₃)
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Answer: B

PVC contains chlorine atoms; burning PVC releases toxic, corrosive hydrogen chloride (HCl) gas.

7. Which element is added to natural rubber during vulcanisation to form cross-links between polymer chains?

  1. Carbon
  2. Sulfur
  3. Nitrogen
  4. Chlorine
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Answer: B

Vulcanisation involves heating natural rubber with sulfur atoms, which form cross-links between adjacent polymer chains.

8. Glucose is the monomer for which pair of natural polymers?

  1. Protein and Starch
  2. Starch and Cellulose
  3. DNA and Protein
  4. Natural rubber and Starch
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Answer: B

Both starch and cellulose are natural polysaccharides formed from glucose monomers.

9. Which of the following polymers is produced via addition polymerisation?

  1. Terylene
  2. Nylon-6,6
  3. Polyvinyl chloride (PVC)
  4. Protein
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Answer: C

Polyvinyl chloride (PVC) is produced by addition polymerisation of chloroethene monomers containing carbon-carbon double bonds.

10. Which plastic material is classified as a thermosetting plastic?

  1. Polythene
  2. Polystyrene
  3. Bakelite
  4. Polypropene
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Answer: C

Bakelite has cross-linked network structures that prevent melting, making it a thermosetting plastic.

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