Question

The equilibrium $P_{4}(s)+6 C l_{2}(g) \rightleftharpoons 4 P C l_{3}(g)$ is attained by mixing equal moles of $P _{4}$ and $Cl _{2}$ in an evacuated vessel. Then, at equilibrium

• A. $\left[ Cl _{2}\right]>\left[ PCl _{3}\right]$
• B. $\left[ Cl _{2}\right]>\left[ P _{4}\right]$
• C. $\left[P_{4}\right]>\left[C l_{2}\right]$
• D. $\left[ PCl _{3}\right]>\left[ P _{4}\right]$

Answer 1

Answer: (C)

For the reaction: $P_{4}(s)+6 Cl _{2}(g) 4 PCl _{3}(g)$

Hence, at equilibrium? $\left[P_{4}\right]>\left[ Cl _{2}\right]$