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Glucose on prolonged heating with HI gives: (1) n-Hexane (2) 1-Hexene (3) Hexanoic acid (4) 6-iodohexanal

1. n-Hexane
2. 1-Hexene
3. Hexanoic acid
4. 6-iodohexanal

Correct answer: n-Hexane

Solution

Prolonged heating of glucose with hydrogen iodide (HI) leads to the reduction of the sugar, resulting in the formation of n-hexane through the complete deoxygenation and saturation of the carbon chain.

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