1.

the decomposition of ammonia on tungsten surface at 500K follows zero order kinetics. The Half-life period of this reaction is 45 minutes when the initial pressure is 4 bar. The half-life period (minutes) of the reaction when the initial pressure is 16 bar at the same temperature is

Answer»

`120`
`60`
`240`
`180`

Solution :For a ZERO order reaction,
`t_(1//2)PROPA` (initial concentration of initial pressure)
`(t_(1//2)_(1)prop_(1)`
`(t_(1//2)_(2)propP_(2)`
`((t_(1//2))_(2))/((t_(1//2))_(1))=(P_(2))/(P_(1)),((t_(1//2))_(2))/(45)=(16)/(4)`
`(t_(1//2))_(2)=(16)/(4)xx45=180` min


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