Can anyone correct me if I`m wrong - fructose belongs to D - series because the last asymmetric chiral carbon has -OH group to the right . But still it is leavo because it rotates the light in Acw direction ?? So it`s given by D-(-)-Fructose While glucose is D-(+)-glucose

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane