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

  • question_answer
    The reaction \[L\xrightarrow{{}}M\] is started with 10.0 g of L. After 30 and 90 minutes 5.0 g and 1.25 g of L respectively are left. The order of the reaction is

    A) 0                                 

    B) 1    

    C) 2                                 

    D) 3

    Correct Answer: B

    Solution :

    [b] After every 30 minutes the amount is reduced to \[\frac{1}{2}\] therefore \[{{t}_{1/2}}\] is 30 minutes. In 90 minutes the amount is reduced to \[\frac{1}{8}\] i.e. \[\frac{1}{{{2}^{n}}}\]. Here n = 3. True for 1st order reaction.


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