How many chiral carbons are present in glucose molecule CHO(CHOH)4CH2OH?
A
1
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B
4
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C
2
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D
3
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Solution
The correct option is B 4 Chiral carbon is a asymmetric carbon where all 4 substituted groups were different.
Glucose is made of 6 membered carbon chain. In carbon 1, aldehyde group will be present. Thus due to doubly bonded to oxygen it is not a chiral carbon. In carbon 6, two hydrogen atoms were attached so its not a chiral carbon. Other four carbons are chiral carbon. It should in the structure below, OHC.CH(OH).CH(OH).CH(OH).CH(OH)CH2OH