The equilibrium:
`P_(4)(g)+6Cl_(2)(g) hArr 4PCl_(3)(g)`
is attained by mixing equal moles of `P_(4)` and `Cl_(2)` in an evacuated vessel. Then at equilibrium:

Options

A. `[Cl_(2)]gt [PCl_(3)]`
B. `[Cl_(2)] gt [P_(4)]`
C. `[P_(4)] gt [Cl_(2)]`
D. `[PCl_(3)] gt [P_(4)]`

Answer

C

Explanation

`{:(,P_(4)(g),+,6Cl_(2)(g),hArr,4PCl_(3)(g)),("Initial",c"mol",,c "mol" ,,),("At eqm.",C(1-alpha),,C(1-6alpha),,4C alpha):}`
Clearly, `[P_(4)] gt [Cl_(2)]` at equilibrium