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

12th Standard

    Reg.No. :
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Chemistry

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

    Part I

    5 x 3 = 15
  1. For a reaction x + y + z\(\longrightarrow \) products the rate law is given by rate =k[x]3/2[y]1/2. What is the overall order of the reaction and what is the order of the reaction with respect to z.

  2. Write Arrhenius equation and explains the terms involved.

  3. Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

    t(min) 0 20 40 60
    v (ml) 20.2 25.6 29.5 32.8 50.4

    Show that the reaction is the first order reactions.

  4. Identify the order for the following reactions
    (i) Rusting of Iron
    (ii) Radioactive disintegration of 92U238
    (iii) 2A+3B⟶ products ;rate = k[A]1/2[B]2

  5. For the reaction 2x+y ⟶ L find the rate law from the following data. 

    [x]
    (min)
    [y]
    (min)
    rate
    (ms-1)
    0.2 0.02 0.15
    0.4 0.02 0.30
    0.4 0.08 1.20

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