Chemistry - Biomolecules Question with Solution | TestHub
A polysaccharide ' X ' on boiling with dil at 393 K under pressure yields ' Y '. ' Y ' on treatment with bromine water gives gluconic acid. ' X ' contains -glycosidic linkages only. Compound ' X ' is:
Options:
Answer:
Solution:
Question Explanation:
We need to identify the polysaccharide ' X ' that yields a reducing sugar on hydrolysis and contains only -glycosidic linkages.
Concept :
Polysaccharides, Hydrolysis, Glycosidic linkage, Oxidation tests
Solution :
• Hydrolysis of X gives Y, which on treatment with Br₂ water forms gluconic acid → Y is a reducing sugar (D-glucose).
• X contains only β-glycosidic linkages → rules out starch (α-linkages), amylose, and amylopectin.
• β-1,4-glycosidic linkage polymer of glucose is cellulose.
Therefore, X = cellulose.
Final Answer: Option (B)
