NEET Chemistry Chemical Kinetics Questions Solved


The half life period of gaseous substance undergoing thermal decomposition was measured for various initial pressure ‘P’ with the following result. 

P(mm)       250     300      400     450

t1/2(min)   136    112.5     85      75.5

Calculate the order of reaction.

(A) 2                                                 

(B) 4

(C) 6                                                 

(D) 10

(A) t1/21an-1 where a is initial conc. or presuure or volume

t1/21t1/22=a2a1n-1

from first & second data

136112.5=300250n-1;1.2=1.2n-1n-1=1 

n=2, Hence reaction is of second order.

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