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Q.

What does 'D' and (+) signifies in D-(+)-glucose?

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a

D represents configuration and (+) represents the laevorotatory nature of molecule

b

D represents conformation and (+) represents the dextrorotatory nature of molecule

c

represents conformation and (+) represents the laevorotatory nature of molecule

d

D represents configuration and (+) represents the dextrorotatory nature of molecule

answer is B.

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Detailed Solution

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Glucose is correctly named as D(+)-glucose. 'D' before the name of glucose represents the configuration whereas '(+)' represents dextrorotatory nature of the molecule. It
may be remembered that 'D' and 'L' have no relation with an optical activity of the compound.

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