When sugar 'X' is boiled with dilute H2SO4 in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation…
Biomolecules · Class 12 · JEE Main Previous Year Question
When sugar 'X' is boiled with dilute in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation with yields saccharic acid whereas 'B' is laevorotatory. The compound 'X' is:
- a
Maltose
- b✓
Sucrose
- c
Lactose
- d
starch
Sucrose
Step 1: Sucrose Hydrolysis — Boiling sucrose ('X') with dilute acid yields an equimolar mixture of -glucose and -fructose.
Step 2: Identifying Products — Glucose ('A') is an aldose that oxidizes to saccharic acid. Fructose ('B') is a ketose and is strongly laevorotatory ().
Step 3: Conclusion — The description of 'X' yielding these two specific isomers identifies the starting compound as sucrose.
Remember: This reaction is the basis for the production of 'invert sugar'.
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