TS EAMCET · Chemistry · Biomolecules
Starch, when boiled with dilute sulphuric acid under high pressure, gives compound \(A\). On prolonged heating with hydroiodic acid, \(A\) gives compound \(B\). What is the compound \(B\) ?
- A \(\mathrm{CH}_3-\left(\mathrm{CH}_2\right)_4-\mathrm{CH}_3\)
- B \(\mathrm{HO}-\mathrm{CH}_2-(\mathrm{CHOH})_4-\mathrm{CHO}\)
- C \(\mathrm{HOOC}-(\mathrm{CHOH})_4-\mathrm{COOH}\)
- D \(\mathrm{HO}-\mathrm{CH}_2-(\mathrm{CHOH})_4-\mathrm{COOH}\)
Answer & Solution
Correct Answer
(A) \(\mathrm{CH}_3-\left(\mathrm{CH}_2\right)_4-\mathrm{CH}_3\)
Step-by-step Solution
Detailed explanation
Starch is a polysaccharide with formula \(\left(\mathrm{C}_6 \mathrm{H}_{10} \mathrm{O}_5\right)_2\), when starch is boiled with dil. \(\mathrm{H}_2 \mathrm{SO}_4\) under high pressure, it hydrolysed to give glucose. Which one pronged heating with \(\mathrm{HI}\) gives…
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