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In the reaction, A rarr Products, when t...

In the reaction, `A rarr` Products, when the concentration of A was reduced from `2.4 xx 10^(-2)M` to `1.2 xx 10^(-2)M`, the rate decreased 8 times at the same temperature. The order of the reaction is

A

0

B

1

C

2

D

3

Text Solution

Verified by Experts

The correct Answer is:
D
Change in concentration
`= 2.4 xx 10^(-2) - 1.2 xx 10^(-2) = 1.2 xx 10^(-2)M`
Rate change = 8 times
`because` Rate `prop ("Change in concenration")^(n)`
`therefore 8 prop (1.2 xx 10^(-2))^(n)`
`2^(3)r prop (1.2 xx 10^(-2))^(n)`
On comparing, the powers of rate and change in concentration.
n = 3
Thus, order of reaction = 3
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