Everything Science Grade 12

(Marvins-Underground-K-12) #1

2.6 CHAPTER 2. ORGANICMACROMOLECULES


(a) The polymer is the product of an addition reaction.
(b) The polymer is a polyester.
(c) The polymer contains an amide linkage.
(d) The polymer contains an ester linkage.


  1. Glucose:
    (a) is a monomer that isproduced during cellular respiration
    (b) is a sugar polymer
    (c) is the monomer of starch
    (d) is a polymer produced during photosynthesis

  2. The following monomers are involved in a polymerisation reaction:


H 2 N C


H


H


C


O


OH H 2 N C


H


H


C


O


+ OH


(a) Give the structural formula of the polymer that is produced.
(b) Is the reaction an addition or condensation reaction?
(c) To what group of organic compounds do thetwo monomers be-
long?
(d) What is the name ofthe monomers?
(e) What type of bondforms between the monomers in the final
polymer?


  1. The table below shows the melting point forthree plastics. Suggest a
    reason why the meltingpoint of PVC is higher than the melting point
    for polyethene, but lower than that for polyester.


Plastic Melting point (^0 C)
Polyethene 105 - 115
PVC 212
Polyester 260


  1. An amino acid has the formula H 2 NCH(CH 2 CH 2 SCH 3 )COOH.
    (a) Give the structural formula of this amino acid.
    (b) What is the chemical formula of the carbon side chain in this
    molecule?
    (c) Are there any peptide bonds in this molecule? Give a reason for
    your answer.


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