Degree of dissociationMediumQuestion 600408
Question
For PCl₅ ⇌ PCl₃ + Cl₂, if 1 mol PCl₅ is taken and α is the degree of dissociation, moles of each at equilibrium are:
- APCl₅: 1−α, PCl₃: α, Cl₂: αCorrect
- BPCl₅: α, PCl₃: 1−α, Cl₂: 1−α
- CPCl₅: 1, PCl₃: α, Cl₂: α
- DAll = 1/3
Correct answer
PCl₅: 1−α, PCl₃: α, Cl₂: α
Explanation
Starting with 1 mol PCl₅. At equilibrium: PCl₅ = 1−α, PCl₃ = α, Cl₂ = α. Total = 1+α moles.