Rates of Reaction : MCQ3

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is the characteristic of the catalyst in surface adsorption theory?

  • It can be either a solid, liquid, or gas
  • It is always a gas
  • It is always a liquid
  • It is always a solid (correct)

What is the effect of an increase in temperature of 10K on the number of collisions?

  • A small increase of 50% (correct)
  • A significant increase of 100%
  • No change
  • A decrease of 20%

What is the effect of catalytic poisons on the reaction rate?

  • They increase the reaction rate by blocking inactive sites
  • They increase the reaction rate by increasing the activation energy
  • They have no effect on the reaction rate
  • They decrease the reaction rate by blocking active sites (correct)

What is the relationship between concentration and rate of reaction?

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

What is the graphical method to determine the instantaneous rate of reaction?

<p>By drawing a tangent to the curve at the point (B)</p>
Signup and view all the answers

What is the characteristic of the reaction if ∆H is negative?

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

What is the effect of increasing the surface area of the catalyst?

<p>It increases the reaction rate due to more available catalytic sites (C)</p>
Signup and view all the answers

What is the term used to describe the accumulation of one substance at the surface of another?

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

What is the primary function of manganese dioxide in the decomposition of hydrogen peroxide?

<p>To act as a catalyst to speed up the reaction (B)</p>
Signup and view all the answers

What is the term for the minimum energy required for colliding particles to result in a reaction?

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

Which of the following is an example of heterogeneous catalysis?

<p>Manganese dioxide in the decomposition of hydrogen peroxide (C)</p>
Signup and view all the answers

What is the rate of reaction measured in terms of?

<p>Change in concentration of products over time (D)</p>
Signup and view all the answers

What is the term for a product of a reaction that becomes a catalyst for the same reaction?

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

Which of the following is NOT a factor affecting the rate of reaction?

<p>Color of the reactants (D)</p>
Signup and view all the answers

What is the term for the theory that involves homogeneous catalysis?

<p>Intermediate formation theory (D)</p>
Signup and view all the answers

What is the definition of a catalyst?

<p>A substance that alters the rate of a chemical reaction, but is chemically unchanged at the end of the reaction (B)</p>
Signup and view all the answers

What is the term for a collision that results in a reaction?

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

Flashcards are hidden until you start studying

Related Documents

Rates of Reaction - B PDF

More Like This

Use Quizgecko on...
Open
Browser
Browser