See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

The ratio of ] Y [ ] X [ is a constant equal to 2 1 k k , only when order is same for both parallel reactions. The overall energy of activation, 2 1 2 2 1 1 k k E k E k E    . For parallel first order reaction, ln t1/2 =       A 693 .0 ln +       T 1 R E .