Asked in PMC Practice Test 34 (2021) 2021

Change in pressure will only affect the substance which are in:

Correct answer: D. Gaseous state

  • A. Liquid state
  • B. Solid State
  • C. Plasma state
  • D. Gaseous state

Explanation

A change in pressure primarily affects substances in the gaseous state. In gasses, molecules are relatively far apart and have high kinetic energy, allowing them to move more freely.

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About Le Chatelier's Principle

Le Chatelier's principle predicts how an equilibrium responds when concentration, pressure or temperature changes. Questions apply it to reversible reactions, identify the direction of shift and distinguish genuine equilibrium changes from the effect of a catalyst, which changes the rate of reaching equilibrium but not its position.

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