In the gas phase reaction, `C_(2H_(5) + H_(2)hArrC_(2)H_(6)`, the equilibrioum constant can be expressessed in units of

Options

A. `"litre"^(-1)"mole"^(-1)`
B. `"litre mole"^(-1)`
C. `"mole"^(2)"litre"^(-2)`
D. `"mole litre"^(-1)`

Answer

B

Explanation

`K = ([C_(2)H_(6)])/([C_(2)H_(4)][H_(2)]) = (["mole"//"litre"])/(["mole"//"litre"]["mole"//"litre"])`
`= "litre"//"mole"` or litre `"mole"^(-1)`