Starch consists mainly of amylose, which is a polymer made from glucose, C6H12O6 - VCE - SSCE Chemistry - Question 18 - 2008 - Paper 1
Question 18
Starch consists mainly of amylose, which is a polymer made from glucose, C6H12O6. A particular form of amylose has a molar mass 3.62 × 10^6 g mol^−1.
A molecule of t... show full transcript
Worked Solution & Example Answer:Starch consists mainly of amylose, which is a polymer made from glucose, C6H12O6 - VCE - SSCE Chemistry - Question 18 - 2008 - Paper 1
Step 1
an addition polymer of 2235 glucose molecules.
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Answer
This option suggests that the polymer is formed by the direct addition of glucose molecules without the loss of any other molecules. This is not the case for amylose.
Step 2
an addition polymer of 2011 glucose molecules.
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Answer
Similar to option A, this suggests a direct addition that does not align with the biological polymerization of amylose.
Step 3
a condensation polymer of 2235 glucose molecules.
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Answer
This option implies that glucose molecules are joined with the loss of a small molecule, likely water. While amylose is a polymer formed from glucose, the specific number of 2235 does not correspond to the provided molar mass.
Step 4
a condensation polymer of 2011 glucose molecules.
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Answer
This is the correct answer because amylose is indeed a condensation polymer formed from glucose units through glycosidic bonds, and the specific number of 2011 relates well to the given molar mass, indicating that it is a longer chain polymer.
