1.

The decomposition of phosphine (PH_3) on tungsten at low pressure is a first order reaction . It is because the ..................[NEET]

Answer»

rate is proportional to the surface converge
rate is inversely proportional to the surface converge
rate of decomposition is slow
rate is independent of the surface

Solution :At low pressure the reaction follows first order , THEREFORE Rate `prop ["reactant"]^(-1)`
Rate `prop` (surface AREA)
At HIGH pressure due to the complete coverage of surface area. The reaction follows ZERO order.
Rate `prop ["reaction"]^0`
Therefore the rate is independent of surface area. .


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