Q.
Which of the following statement is correct about fructose?
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a
It is dextrorotatory compound
b
It exists in the two cyclic forms which is obtained by the addition of -OH at C-5 to the Group
c
It exists as six membered ring
d
It is named as furanose as it contain one oxygen and six carbon atom.
answer is B.
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Detailed Solution
Fructose has the molecular formula C6H12O6. It belongs to D-series and is laevorotatory compound. It also exists in two cyclic forms which are obtained by the addition of-OH at C-5 to the group. The ring thus formed is a five membered ring and is named as furanose with the analogy to the compound furan.Furan is a five membered cyclic compound with one oxygen and four carbon atoms.
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