Passage: Consider the following reaction sequence in which J , K , L and M are the major products. Given: Atomic mass (in amu): H : 1 , C : 12 , N : 14 , O : 16 , S : 32 , Br : 80 , Ba : 137 Question: The volume of 1 M aqueous H ₂ SO ₄ required to completely neutralize the ammonia evolved from 5.72 g of L in Kjeldahl's method of nitrogen estimation is ____ mL.

Step-by-step solution

The reaction sequence proceeds as follows: 1. Friedel-Crafts Acylation: Reaction of m -xylene (1,3-dimethylbenzene) with chloroacetyl chloride ( ClCH ₂ COCl ) in the presence of anhydrous AlCl ₃ occurs at the less sterically hindered activated position (position 4) to give 1-(2,4-dimethylphenyl)-2-chloroethan-1-one. 2. Finkelstein Reaction: Heating with NaI replaces the chloride with iodide, yielding 1-(2,4-dimethylphenyl)-2-iodoethan-1-one. 3. Williamson Ether Synthesis: Reaction with sodium 3-nitrophenoxide gives