Chemistry - ALCOHOL & ETHER Question with Solution | TestHub

Question Explanation:

Find how many moles of HIO₄ are used to cleave the given polyol (carbohydrate).
Concept:

This is based on oxidative cleavage of 1,2-diols, alpha hydroxy carbonyls and alpha diketones. Solution:

1. HIO₄ cleaves C–C bonds only when both carbons carry –OH or =O groups.

2. The molecule contains three consecutive carbons (C1–C2–C3–C4) each having OH/CHO groups.

3. Therefore three adjacent 1,2-diol/α-oxo positions exist → three C–C bonds get cleaved.

4. Each cleavage uses 1 mole of HIO₄ , so total = 3 moles.