JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Sample Paper Topic Test - Chemical Kinetics

  • question_answer
    If a first-order reaction is completed to the extent of 60% and 20% in time intervals, \[{{t}_{1}}\] and \[{{t}_{2}},\] what is the ratio \[{{t}_{1}}:{{t}_{2}}\]

    A) 6.32                             

    B) 5.58         

    C) 4.11       

    D) 8.33

    Correct Answer: C

    Solution :

    \[{{t}_{1}}=\frac{2.303}{K}\log \left( \frac{100}{40} \right)\]                               … (i) \[{{t}_{2}}=\frac{2.303}{K}\log \left( \frac{100}{80} \right)\]                               .....(ii) From (i) and (ii), \[\frac{{{t}_{1}}}{{{t}_{2}}}=4.11\]

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