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 × 10⁶ g mol⁻¹.
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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 polymerization involves addition reactions. However, this is incorrect for amylose.
Step 2
an addition polymer of 2011 glucose molecules.
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Answer
Similar to the previous option, this describes an addition reaction which doesn't accurately represent amylose.
Step 3
a condensation polymer of 2235 glucose molecules.
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Answer
This implies a condensation reaction with 2235 glucose units, which is not supported by the molar mass.
Step 4
a condensation polymer of 2011 glucose molecules.
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Answer
This is the correct answer. Amylose is a condensation polymer formed from the condensation reactions of multiple glucose molecules, specifically 2011 in this case, which aligns with the stated molar mass.
