1.

The decomposition of phosphine (PH_(3)) on tungsten at low pressure is a first-orfer reaction . It is because the

Answer»

RATE of decomposition is very slow
Rate is proportional to the surface coverage
Rate is inversely proportional to the surface coverage
Rate is INDEPENDENT of the surface coverage

Solution :`PH_(3) overset(W) (to) P + (3)/(2) H_(2) ""` Rate = `k[PH_(3)]`
It is independent of the the surface coverage because ZERO ORDER REACTION depend on surface area covered by reactant .


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