How many isomeric aldoses are possible for the molecular formula C6H12O6?
Correct answer: D. 16
- A. 2
- B. 4
- C. 7
- D. 16
Explanation
An aldohexose has four chiral carbon atoms, so the number of possible stereoisomeric aldoses is 2^4 = 16. Students may choose 7 by counting only some familiar aldohexoses instead of applying the stereoisomer formula for four chiral centres.
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About Isomerism
Isomerism occurs when compounds have the same molecular formula but different atom arrangements or spatial orientations. The content includes chain, position, functional, metameric and tautomeric isomerism, along with geometrical and optical isomerism, including cis-trans forms, E/Z notation, chirality and enantiomers.
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