99 Percentile Qs Bank for JEE MainChemistryChemical Equilibrium
The equilibrium constant ( K p ) for the decomposition of gaseous H 2 O H 2 O g ⇌ H 2 g + 1 2 O 2 ( g ) is related to degree of dissociation ( α ) at a total pressure p is given by
Options
- AK p = α 3 p 1 / 2 1 + α 2 + α 1 / 2
- BK p = α 3 p 3 / 2 1 - α 2 + α 1 / 2
- CK p = α 3 / 2 p 2 1 - α 2 + α 1 / 2
- DK p = α 3 / 2 p 1 / 2 1 - α 2 + α 1 / 2
Correct answer
D. K p = α 3 / 2 p 1 / 2 1 - α 2 + α 1 / 2
Step-by-step solution
H 2 O g ⇌ H 2 g + 1 2 O 2 ( g )     1                           0                 0           ( i n i t a l l y ) 1 - α                     α                 α 2       ( a t   e q u i l i b r i u m )       Total moles of water at equi