Rates of Reaction: MCQ2

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the purpose of manganese dioxide in the breakdown of hydrogen peroxide?

  • To act as a catalyst to speed up the reaction (correct)
  • To alter the particle size of the reactants
  • To decrease the temperature of the reaction
  • To increase the concentration of oxygen

What is the definition of a catalyst?

  • A substance that alters the rate of a chemical reaction and is chemically changed at the end of the reaction
  • A substance that alters the rate of a chemical reaction, but is chemically unchanged at the end of the reaction (correct)
  • A substance that slows down the rate of a chemical reaction
  • A substance that increases the activation energy of a reaction

What is the term for the minimum energy required for colliding particles to react?

  • Catalyst energy
  • Reaction rate
  • Particle energy
  • Activation energy (correct)

What type of catalysis involves a catalyst in a different physical phase to the reactants?

<p>Heterogeneous catalysis (B)</p> Signup and view all the answers

What is the term for the rate at a particular point in time during a reaction?

<p>Instantaneous rate (C)</p> Signup and view all the answers

What is the equation for the breakdown of hydrogen peroxide?

<p>H2O2 → H2O + ½ O2 (C)</p> Signup and view all the answers

What is the term for the change in concentration of any one reactant or product in unit time?

<p>Rate of reaction (C)</p> Signup and view all the answers

What type of catalysis is involved in the intermediate formation theory?

<p>Homogeneous catalysis (C)</p> Signup and view all the answers

What is the primary role of a catalyst in a chemical reaction?

<p>To lower the activation energy of the reaction (B)</p> Signup and view all the answers

What is the term for a collision that results in product formation?

<p>Effective collision (C)</p> Signup and view all the answers

What is the term for the accumulation of one substance at the surface of another?

<p>Adsorption (A)</p> Signup and view all the answers

What is the term for substances that can block active sites on a catalyst, reducing its effectiveness?

<p>Catalytic poisons (D)</p> Signup and view all the answers

How does the surface area of a catalyst affect the reaction rate?

<p>A larger surface area increases the reaction rate (D)</p> Signup and view all the answers

What is the term for the energy barrier that must be overcome for a reaction to occur?

<p>Activation energy (C)</p> Signup and view all the answers

What is the relationship between concentration and rate in a chemical reaction?

<p>Concentration is directly proportional to rate (B)</p> Signup and view all the answers

What is the type of catalysis that occurs when the reactants are gases and the catalyst is a solid?

<p>Heterogeneous catalysis (D)</p> Signup and view all the answers

What is the term for the rate of reaction found by drawing a tangent to the curve at a point?

<p>Instantaneous rate of reaction (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Related Documents

Rates of Reaction - B PDF
Use Quizgecko on...
Browser
Browser