Which one of the following statements about sweeteners is correct?
A - VCE - SSCE Chemistry - Question 17 - 2022 - Paper 1
Question 17
Which one of the following statements about sweeteners is correct?
A. Glucose and fructose are optical isomers.
B. Glucose reacts as a monomer in the body.
C. 2 m... show full transcript
Worked Solution & Example Answer:Which one of the following statements about sweeteners is correct?
A - VCE - SSCE Chemistry - Question 17 - 2022 - Paper 1
Step 1
A. Glucose and fructose are optical isomers.
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Answer
This statement is incorrect. Glucose and fructose are structural isomers, specifically isomers with different structural formulas but the same molecular formula (C6H12O6).
Step 2
B. Glucose reacts as a monomer in the body.
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Answer
This is also incorrect in a broader context. While glucose is utilized in various metabolic pathways, it does not necessarily 'react' as a monomer; rather, it is a key monosaccharide that can form polysaccharides.
Step 3
C. 2 mol of glucose has the same energy content as 1 mol of sucrose.
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Answer
This statement is correct. In terms of energy, the complete oxidation of glucose yields approximately 16.7 kJ/g, while sucrose provides similar energy per mole when considering its dissociation into glucose and fructose.
Step 4
D. Sucrose has an energy output almost 200 times the energy output of aspartame.
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Answer
This is incorrect. Aspartame is an artificial sweetener that has a significantly low energy output when compared to sucrose. The energy output is not close to 200 times.
