Q.

2NOg+Cl2g2NOCls

This reaction was studied at -10°C and the following data was obtained 

Run                  NO0                        Cl20                          r0

1                      0.10                           0.10                      0.18 

2                       0.10                           0.20                      0.35

3                       0.20                           0.20                      1.40        

[NO]0 and Cl20are the initial concentration and r0 is the initial reaction rate. The overall order of the reaction is _________. ( Round off to the Nearest Integer).                     

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answer is 3.

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Detailed Solution

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r1=k[NO]mCl2n So 0.180.35=0.10.2nn=10.351.40=0.10.2nm=2

So overall order = 3

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