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JEE Main 2013 Chemistry question

ChemistryAminesJEE Main 2013

A compound with molecular mass 180 is acylated with CH₃COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is -

Answer: (4)

Solution

Each acylation increases mass by 42. Total increase = 390-180 = 210. Number of NH₂ groups = 210/42 = 5.

Question ID VK-000897