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In a reaction, if the concentration of reactants is doubled, what happens to the

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Question: In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if the reaction is first order? (2023)

Options:

  1. Doubles
  2. Triples
  3. Quadruples
  4. Remains the same

Correct Answer: Doubles

Exam Year: 2023

Solution: 

For a first-order reaction, the rate is directly proportional to the concentration of reactants, so doubling the concentration doubles the rate.

In a reaction, if the concentration of reactants is doubled, what happens to the

Practice Questions

Q1
In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if the reaction is first order? (2023)
  1. Doubles
  2. Triples
  3. Quadruples
  4. Remains the same

Questions & Step-by-Step Solutions

In a reaction, if the concentration of reactants is doubled, what happens to the rate of reaction if the reaction is first order? (2023)
  • Step 1: Understand what a first-order reaction means. In a first-order reaction, the rate of the reaction depends on the concentration of one reactant.
  • Step 2: Know that 'rate' refers to how fast the reaction occurs.
  • Step 3: Recognize that if you double the concentration of the reactant, you are increasing the amount of reactant available for the reaction.
  • Step 4: Since the reaction is first-order, the rate of the reaction is directly proportional to the concentration of the reactant.
  • Step 5: Therefore, if you double the concentration of the reactant, the rate of the reaction will also double.
  • First-Order Reaction – In a first-order reaction, the rate of reaction is directly proportional to the concentration of one reactant.
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