Chemistry CBSE Class 12 Sample Paper for 2023 Boards - Solutions

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Chemistry Class 12
Solutions to CBSE Sample Paper - Chemistry Class 12

Question 20 (Choice 1) - Chemistry CBSE Class 12 Sample Paper for 2023 Boards - Solutions - Solutions to CBSE Sample Paper - Chemistry Class 12

Last updated at July 18, 2026 by

Account for the following:

  1. There are 5 OH groups in glucose
  2. Glucose is a reducing sugar

 

Answer:

a. Acetylation of glucose with acetic anhydride gives glucose pentaacetate which confirms the presence of five –OH groups. Since it exists as a stable compound, five –OH groups should be attached to different carbon atoms

Question 20 - Acetylation of glucose with - teachoo.jpg

b. Glucose reduces Fehlings reagent

Question 20b - Glucose reduces Fehlings reagent - teachoo.jpg

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