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Consider reaction in which reactant R is...

Consider reaction in which reactant `R` is converted into product `P`: `RtoP`. When the initial concentration of `R^(')` is `0.5M` The half life of the reaction is 20 minute. When the initial concentration is increased to 1.3 M, the half life decreases to 7.69 minute.
Q. What is the order of the reaction?

A

0

B

1

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
C, D
`t_((1)/(2))prop(1)/([A_(@)]^(n-1))`
`because20=K(1)/([0.5]^(n-1)),7.69=K(1)/([1.3]^(n-1))`
`n=` order `[A_(0)]=` initial concentration, `K=` constant
`(20)/(7.69)=2.6=((1.3)/(0.5))^(n-1)=(2.6)^(n-1)`
`becausen-1=1becausen=2`
`2^(nd)` order
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