GATE 2023 MT – Question 32
Maximum number of phases that can be in equilibrium for a 5-component system at constant temperature and pressure is _________ (in integer).
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Correct answer: 5 to 5
Explanation
At fixed temperature and pressure, the reduced phase rule is $F=C-P$. Since $F\ge0$, $P\le C=5$. The maximum permitted number is **5 phases**.