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Question

An organic compound A(C10H18O8) on treatment with excess of CH3COCl gives a fully acetylated product whose molar mass is found to be 518 g/mol. How many hydroxyl functional groups are present in A?

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Solution


Mass gain due to incoporation of one acetyl group = 59 - 17 = 42
Net mass gain due to acetylation = 518 - 266 = 252
Hence, six hydroxy groups must be present. (6×42 = 252)

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