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Solution


Q.

Match List I with List II

  List I   List II
A. α-Glucose and α-Galactose I. Functional isomers
B. α-Glucose and β-Glucose II. Homologous
C. α-Glucose and α-Fructose III. Anomers
D. α-Glucose and α-Ribose IV. Epimers

 

Choose the correct answer from the options given below:              [2024]
1 A-III, B-IV, C-II, D-I  
2 A-III, B-IV, C-I, D-II  
3 A-IV, B-III, C-II, D-I  
4 A-IV, B-III, C-I, D-II  

Ans.

(4)

    A. Epimers are diastereomers that differ in configuration at only one chiral centre. α-Glucose and α-Galactose are C-4 epimers.

   B. Anomers are epimers which differ in configuration at acetal or hemiacetal carbon. α-D-glucose and β-D-glucose are anomers.

   C. Glucose is an aldohexose and fructose is a ketohexose. These are thus functional isomers.

   D. Formula of glucose (C6H12O6) differs by — CH2 unit with the formula of ribose (C5H10O5). So, Homologns