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Consider a reaction, 2A + B rarr Product...

Consider a reaction, `2A + B rarr` Products
When concentration of `B` alone was doubled, the half-life did not change. When the concentration of `A` alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is :

A

(a) `L mol^(-1) s^(-1)`

B

(b) No unit

C

(c ) `mol L^(-1) s^(-1)`

D

(d) `s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
a
`2A+B rarr Product`
When conc. Of `B` is doubled, the half-life did not change, hence reaction is of first w.r.t. B. When concentration of A is doubled, reaction rate is doubled, hence reaction is of first order w.r.t. A. Hence, overall of reaction is `1+1=2`
So, unit of rate constant is `mol^(-1)` litre `s^(-1)`
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