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12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I Question Bank Software Jun-02 , 2021

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12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 15

    Part I

    5 x 3 = 15

  1. The decomposition of Cl2O7 at 500K in the gas phase to Cl2 and O2 is a first order reaction. After 1 minute at 500K, the pressure of Cl2O7 falls from 0.08 to 0.04 atm. Calculate the rate constant in s-1

  2. Explain pseudo first order reaction with an example.

  3. A gas phase reaction has energy of activation 200 kJ mol-1. If the frequency factor of the reaction is 1.6 x 1013s-1. Calculate the rate constant at 600 K.(e-40.09 = 3.8 x 10-48)

  4. A first order reaction takes 8 hours for 90% completion. Calculate the time required for 80% completion. (log 5 = 0.6989 ; log10 = 1)

  5. Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

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