Biomolecules and Chemistry in Everyday Life - Result Question 32

33. When the following aldohexose exists in its $D$-configuration, the total number of stereoisomers in its pyranose form, is

(2012)

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Answer:

Correct Answer: 33. $(8)$

Solution:

  1. The D-form of given sugar is

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Configurations at the three chiral carbons (starred) can be changed maintaining D-configuration. Hence, the total number of steroisomers of $D$-pyranose $=2^{3}=8$

Thus, the correct integer is $8 $.