DP Chemistry Questionbank

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• 18M.3.sl.TZ2.4a: Sketch four repeating units of the polymer to show atactic and isotactic polypropene.
• 18M.3.sl.TZ1.4b.ii: State one way in which a physical property of HDPE, other than density, differs from that of LDPE...
• 18M.3.sl.TZ1.4b.i: Compare and contrast the structures of HDPE and LDPE.
• 18M.3.sl.TZ1.4a: Both of these are thermoplastic polymers. Outline what this term means.
• 18M.3.hl.TZ1.4c.ii: Deduce, giving a reason, whether the atom economy of a condensation polymerization, such as this,...
• 17N.3.sl.TZ0.7b.i: Describe how the structures of LDPE and HDPE affect one mechanical property of the plastics.
• 17M.3.hl.TZ2.3c: Estimate the atom economy of this first step.
• 17M.3.sl.TZ2.3c.ii: Suggest a reason why nanoparticles can better anchor plasticizers in the polymer.
• 17M.3.sl.TZ2.3c.i: Explain how the structure of plasticizers enables them to soften PVC.
• 17M.3.sl.TZ1.10b.ii: Explain why the difference in their structures affects their melting points.
• 17M.3.sl.TZ1.10b.i: Describe the difference in their structures.
• 17M.3.sl.TZ1.10a: Below are the IR spectra of two plastics (A and B); one is PETE, the other is low density...
• 16N.3.sl.TZ0.6c: (i) Suggest why incomplete combustion of plastic, such as polyvinyl chloride, is common in...
• 16N.3.sl.TZ0.6b: Deduce the percentage atom economy for polymerization of 2-methylpropene.
• 16N.3.sl.TZ0.6a: (i) Draw the structure of 2-methylpropene. (ii) Deduce the repeating unit of poly(2-methylpropene).
• 16M.3.sl.TZ0.7b: (i) Explain, in molecular terms, why PVC becomes more flexible and softer when a plasticizer is...
• 16M.3.sl.TZ0.7a: Sketch the atactic form of polychloroethene showing four units.
• 15M.3.sl.TZ1.10a.i: Identify the two functional groups in the monomer from which this polymer is manufactured.
• 15M.3.sl.TZ1.10a.ii: An expanded form of the plastic is often used in packaging. Describe how this is manufactured.
• 15M.3.sl.TZ1.10b: Discuss two advantages and one disadvantage of using the expanded form as a packaging...
• 14M.3.hl.TZ2.12a: (i)     Other than density, state two differences in the physical properties of HDPE and...
• 14M.3.hl.TZ2.12b: State the conditions required to produce HDPE and LDPE and the name of each type of mechanism...
• 14M.3.sl.TZ2.9b: (i)     Other than density, state two differences in the physical properties of HDPE and...
• 14M.3.sl.TZ2.9c: It has been said that bitumen and heavy fuel oils are too valuable a resource to use for road...
• 13N.3.hl.TZ0.11d.ii: Explain why the isotactic form is more suitable for the manufacture of strong fibres.
• 13N.3.hl.TZ0.11d.i: Draw the structure of the isotactic form of polyacrylonitrile showing three repeating units.
• 13N.3.sl.TZ0.9a.i: Polyacrylonitrile is similar to polypropene and can exist in two forms.   Draw the structure of...
• 13N.3.sl.TZ0.9a.ii: Polyacrylonitrile is similar to polypropene and can exist in two forms.   Explain why the...
• 13M.3.sl.TZ1.C4a: State the difference in the structure of the two polymers.   Isotactic:     Atactic:
• 13M.3.sl.TZ1.C4b: Explain how the difference in structure results in the different properties of isotactic and...
• 13M.3.sl.TZ2.C3a.i: Describe how the two forms differ in their chemical structure.
• 13M.3.sl.TZ2.C3a.ii: Explain in terms of their structures how the flexibility of the two forms of poly(ethene) differ.
• 13M.3.sl.TZ2.C3b.ii: State one use for the product formed from this process.
• 13M.3.sl.TZ2.C3b.i: Describe why pentane is sometimes added during the formation ofpoly(phenylethene), also known as...
• 12N.3.sl.TZ0.C3a: (i)     Strongest intermolecular forces: (ii)     Highest density: (iii)     Greatest flexibility:
• 09N.3.sl.TZ0.C2a: Explain why PVC is less flexible than polyethene.
• 09N.3.sl.TZ0.C2b: State how PVC can be made more flexible during its manufacture and explain the increase in...
• 09N.3.sl.TZ0.C2c: PVC can exist in isotactic and atactic forms. Draw the structure of the isotactic form showing a...
• 10M.3.sl.TZ1.C2a: Use high-density poly(ethene) and low-density poly(ethene) as examples to explain the difference...
• 10M.3.sl.TZ1.C2b: During the formation of poly(styrene), a volatile hydrocarbon such as pentane is often added....
• 10M.3.sl.TZ2.C3: (a)     For two different addition polymers, describe and explain one way in which the properties...
• 09M.3.hl.TZ2.C4a: State the type of mechanism occurring in the manufacture of low-density poly(ethene).
• 11M.3.hl.TZ1.C2b: Ethene is one of the major products of this process and much of it is converted to polyethene...
• 11M.3.sl.TZ1.C2c: Many of the compounds produced by cracking are used in the manufacture of addition polymers....
• 11M.3.sl.TZ1.E1a: State an equation that shows why rain water is naturally acidic.
• 11M.3.sl.TZ1.C2d: The polymers often have other substances added to modify their properties. One group of additives...
• 12M.3.hl.TZ1.C3a: Outline the difference in the way in which polymerization occurs, stating a specific example of a...
• 12M.3.hl.TZ1.C3b: Polymers can either soften when heated or remain rigid until they decompose or combust. Other...
• 12M.2.hl.TZ2.10a.ii: Deduce the structure of the simplest repeating unit of the polymer formed from the reaction...
• 12M.3.sl.TZ2.C3a: Ethene can be polymerized to form high-density poly(ethene), HDPE, or low-density poly(ethene),...
• 12M.3.sl.TZ2.C3b: (i)     The repeating unit of poly(propene) has the...
• 11N.3.sl.TZ0.E1a: Nitrogen dioxide is formed in a two-stage process. Describe one anthropogenic (man-made) source...
• 11N.3.sl.TZ0.C2b: Describe a structural feature of low-density polyethene (LDPE) that explains why LDPE has a...
• 11N.3.sl.TZ0.C2a: Titanium compounds are used as catalysts in the manufacture of high-density polyethene (HDPE)....