Chemical Kinetics Question 293
Question: For the reaction system: $ 2NO( g )+O_2( g )\to 2NO_2( g ) $ volume is suddenly reduced to half its value by increasing the pressure on it. If the reaction is of first order with respect to $ O_2 $ and second order with respect to NO, the rate of reaction will
Options:
A) diminish to one-eighth of its initial value
B) increase to eight times of its initial value
C) increase to four times of its initial value
D) diminish to one-fourth of its initial value
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Answer:
Correct Answer: B
Solution:
[b] $ r=k[O_2]{{[NO]}^{2}} $ . When the volume is reduced to 1/2, the conc. will double
$ \therefore $ New rate $ =k[2O_2]{{[2NO]}^{2}}=8k[O_2]{{[NO]}^{2}} $ The new rate increases to eight times of its initial.
