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When sugar ‘X’ is boiled with dilute H 2 SO 4 in alcoholic solution, two isomers ‘A’ and ‘B’ are formed. ‘A’ on oxidation with HNO 3 yields saccharic acid whereas ‘B’ is laevorotatory. The compound ‘X’ is :

1. Maltose
2. Sucrose
3. Lactose
4. Starch

Correct answer: Sucrose

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