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[Solved] Which of the following experimental plans to test the effects of pressure on a reaction with gases

Which of the following experimental plans to test the effects of pressure on a reaction with gases and what is the expected result? 

  1. Keep pressure constant and decrease the temperature of the reaction; reaction rate will decrease .
  2. Keep pressure constant and increase the temperature of the reaction; reaction rate will decrease.
  3. Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
  4. Keep temperature constant and decrease the pressure of the reaction; reaction rate will increase.

The answer is option 4. Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.