For the decomposition of H I at 1000 K 2 H I → H 2 + I 2 , the following data were obtained Conc. Of HI(M) Rate of decomposition of HI (mole/unit sec) 0.1 2.75 × 10 − 8 0.2 11 × 10 − 8 0.3 24.75 × 10 − 8 The order of reaction is :

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Correct answer: B. 2

R a t e = k H I n 11 × 10 - 8 = k 0.2 n . . . i 2.75 × 10 - 8 = k 0.1 n . . . i i Dividing eq. (i) by eq. (ii), 4 = 2 n , n = 2

For the decomposition of H I at 1000 K 2 H I → H 2 + I 2 , the following data were obtained Conc. Of HI(M) Rate of decomposition of HI (mole/unit sec) 0.1 2.75 × 10 − 8 0.2 11 × 10 − 8 0.3 24.75 × 10 − 8 The order of reaction is :

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