See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

(A) For a first order reaction, the concentration of reactant, the concentration of reactant remaining after time t is given by [A] = [A]0e-kt. Therefore, concentration of reactant decreases exponentially with time. (B) Rise in temperature increases rate constant(k) and therefore decreases half-life(t1/2) as 1/2 ln2 t k  [A] t (C) Half-life of first order reaction is independent of initial concentration (D) For a first order reaction, if 100 moles of reactant is taken initially, after n half-lives, reactant remaining is given by n 8 1 1 %A 100 100