JEE Main Chemistry question

[K CET 2010] The letter 'D' in D-glucose signifies

(A)Configuration at all chiral carbons
(B)Dextrorotatory
(C)That it is a monosaccharide
(D)Configuration at a particular chiral carbonCorrect

Answer: (D)

Solution

The D/L descriptor is assigned purely by comparing the configuration at the highest-numbered (penultimate) chiral carbon to that of D- or L-glyceraldehyde; it says nothing about the sign of optical rotation (that is

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Question ID VK-150620