JEE Advanced 2026 · Paper 2, Chemistry question 14

In the following reaction sequence, major products X and Y are acyclic monomers.

$\ce{CH3I}$ $\xrightarrow[\text{3. Red P, }\ce{Br2}\quad\text{4. }\ce{NH3}\text{ (excess)}]{\text{1. KCN}\quad\text{2. }\ce{H3O+},\ \Delta}$ X

Caprolactam $\xrightarrow[\Delta]{\ce{H3O+}}$ Y

500 mol of X completely reacts with 500 mol of Y to give 1 mol of a single biodegradable acyclic copolymer Z as the only product. The amount of Z formed in grams is ____.

Given: Atomic mass (in amu): H : 1, C : 12, N : 14, O : 16, Br : 80