Sulfur can exist in four phases. The possible number of triple points is
(a)1
(b)2
(c)3
(d)4
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
With four phases, any three can coexist at a triple point: ⁴C₃ = 4 possible triple points (a quadruple point is impossible for one component, F = 1 − 4 + 2 < 0).