JEE Main 2016 Chemistry question

An organic compound contains C, H and S. The minimum molecular weight of the compound containing 8% Sulphur is

Answer: (3)

Solution

Sulphur can only be present in whole atoms, each contributing 32 g mol. If the molecule contains sulphur atoms, then

×100 = 8 ⇒ M = 400n.

The molecular weight is therefore smallest when is

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Question ID VK-115524