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NEET Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Self Evaluation Test - Chemical Kinetics

  • question_answer
    For the reaction system: \[2NO\left( g \right)+{{O}_{2}}\left( g \right)\to 2N{{O}_{2}}\left( g \right)\] 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

    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

    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 \[=k[2{{O}_{2}}]{{[2NO]}^{2}}=8k[{{O}_{2}}]{{[NO]}^{2}}\] The new rate increases to eight times of its initial.


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