See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

For a zero order reaction 1/2 1/2 a a t or k 2k 2t   and x = kt 75% 3a k.t 4  1/2 75% 1/2 6t 3a 3a t a 4 k 4 4 2t      6 6 9 min 4    .