Compounds A and B react with a common reagent with first order kinetics in both cases. If 99% of A must react before 1% of B has reacted, what is the

Question

Compounds A and B react with a common reagent with first order kinetics in both cases. If 99% of A must react before 1% of B has reacted, what is the

Compounds A and B react with a common reagent with first order kinetics in both cases. If 99% of A must react before 1% of B has reacted, what is the minimum ratio for their respective rate constants ?
A. 916
B. 229
C. 500
D. 458

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
The fraction of A and B remaining at time t when 99% of A has reacted, are (A=0.01, B=0.99)
`k_A=1/t` In 100 and `k_B=1/t` In `100/99`
`:. K_A/k_B=(ln 100)/(ln[100//99])=458`

5 views Answered 2023-02-05 15:29