Triple point can be defined as:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. the condition of temperature and pressure under which the gaseous, liquid and solid phases of a substance can exist in equilibrium.
At the triple point, all three phases of a substance—solid, liquid, and gas—coexist in a thermodynamic equilibrium. It's a unique combination of temperature and pressure specific to each substance.