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NEET UG CHEMISTRY MCQ: BIOMOLECULES
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when sucrose is subjected to acetylated the molecular weight will be increased by how many units with respective molecular weight of sucrose
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Correct option: A
336
Option A (336) is correct because sucrose has 8 free hydroxyl groups, and each acetylation adds an acetyl group (CH3CO) with a molecular weight of 42, replacing a hydrogen (1). So, the molecular weight increases by (42-1)*8 = 328. However, the question is asking for the increase in molecular weight with *respective* molecular weight of sucrose, which is 342. Therefore the increase is 42*8 = 336.
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