The half -lie period for the decomposition of `AB_(2)(g)` at `100mm` pressure is `10min` and at `200mm` pressure is 5 min, the order of reaction is

Answer

2

Explanation

`((t_(1//2))_(1))/((t_(1//2))_(2))=((P_(2))/(P_(1)))^(n-1) n-1=1`
`10/5 =(200/100)^(n-1) n=2`
`2=2^(n-1)`