The half life period for catalytic decomposition of X Y 3 at 100 mm is found to be 8 hrs and at 200 mm it is 4 hrs. The order of reaction is

Step-by-step solution

The value of order of reaction using half life and pressure values can be find out by using this relation given below t 1 2 1 t 1 2 2 = P 2 P 1 n - 1 or 8 4 = 200 100 n - 1 ( 2 ) 1 = ( 2 ) n - 1 or 1 = n - 1 So, n = 2 . Hence, it is second order reaction.