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NEETChemistryStates of Matter

What is the initial reason a clear boundary is visible between the liquid and vapor phases when heating a liquid in a closed vessel?

Options

  1. AThe vapor becomes denser than the liquid
  2. BThe liquid becomes less dense
  3. CThe temperature decreases
  4. DThe density of the vapor decreases

Correct answer

B. The liquid becomes less dense

Step-by-step solution

Initially, a clear boundary is visible because the liquid becomes less dense as it is heated.

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