If compound A reacts with B following first order kinetics with rate constant 2.011 × 10–3 s–1. The time taken by A (in seconds) to reduce from 7 g to 2 g will be ________. (Nearest Integer) [log 5 =

Question

If compound A reacts with B following first order kinetics with rate constant 2.011 × 10–3 s–1. The time taken by A (in seconds) to reduce from 7 g to 2 g will be ________. (Nearest Integer) [log 5 = 0.698, log 7 = 0.845, log 2 = 0.301]

Prashant Kotian · Accepted Answer

Correct answer: .. K =       x a a ln t K =       t w w ln t t =       7 ln K t = ] log – [log K . = ] . – . [ K . = – 011 . 303 .  × 0.544 = 622.989 sec

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