Consider the Following Reaction at a Certain Temperature:
PCl₅(g) $f$ PCl₃(g)+ Cl₂(g)
K_c = 0

Consider the following reaction at a certain temperature:
PCl₅(g)
$f$
PCl₃(g) + Cl₂(g)
K_c = 0.100
At equilibrium,[PCl₅] = 2.00 M and [PCl₃] = [Cl₂] = 1.00 M.
If suddenly 1.00 M PCl₅(g) ,PCl₃(g) , And Cl₂(g) Is added,What is the equilibrium concentration of PCl₅(g) ?

A) 0.65 M
B) 4.35 M
C) 1.35 M
D) essentially zero
E) 2.35 M