1.

Identify the order for the following reactions (i) Rusting of Iron (ii) Radioactive disintegration of ._(92)U^(238). (iii) 2A+B rarr products , rate =k[A]^(1//2)[B]^2

Answer»

Solution :(i) `2Fe+underset(("EXCESS"))(3O_2)overset(H_2O("excess"))rarr2Fe_2O_3.xH_2O`
Theoretically order vale may be more than ONE practically one.
(ii) All RADIOACTIVE disintegration are first order reactions
(iii) `2A +3B rarr ` PRODUCTS
rate = `k[A]^(1//2)[B]^2`
Order `=1/2+2=5/2=2.5`


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