Question

The decomposition of phosphine `(PH_(3))` on tungsten at low pressure is a first-orfer reaction . It is because the
A. Rate of decomposition is very slow
B. Rate is proportional to the surface coverage
C. Rate is inversely proportional to the surface coverage
D. Rate is independent of the surface coverage

Answer 1

Correct Answer - d
`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 .