For a first order homogeneous gaseous reaction A 2B C   then initial pressure was Pi while total p — AITS & Test Series Chemistry Question

Question

For a first order homogeneous gaseous reaction A 2B C   then initial pressure was Pi while total pressure after time t was Pt. Then expression for rate constants K in terms Pi, Pt and t is. (A) i i t 2p 2.303 K log t 3P P (B) i t i 2P 2.303 K log t 2P P (C) i i t P 2.303 K log t P P (D) None of these