NEET Chemistry Chemical Kinetics Questions Solved

BOARD

The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :

SO2Cl2(g) SO2 (g) + Cl2(g)

Experiment           time/s-1              Total pressure/atm

   1                        0                          0.4

   2                     100                          0.7

Calculate the rate constant.

(Given :log 4 = 0.6021, log 2 = 0.3010)

a) 3.386× 10-2 s-1

b) 2.386× 10-2 s-1

c) 1.986× 10-2 s-1

d)1.386× 10-2 s-1

SO2Cl2(g) SO2 (g) + Cl2(g)

Using formula, K = 2.303tlog P2P- Pt

When t=100 s

     K = 2.303100log 0.42×0.4- 0.7

         = 2.303100log 0.40.8- 0.7  = 2.303100log 0.40.1

          = 2.303100log 41 = 2.303100log 4

           = 2.303100×0.6021  = 1.386× 10-2 s-1

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