Mechanism of Reaction and Catalysis (Grade 12 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What two conditions must be met for a collision between particles to result in a chemical reaction?
What two conditions must be met for a collision between particles to result in a chemical reaction?
Sufficient energy & correct orientation
What is activation energy?
What is activation energy?
Min energy required for a reaction
Why does increasing temperature speed up a chemical reaction?
Why does increasing temperature speed up a chemical reaction?
More particles exceed activation energy
On an energy distribution curve, what does the shaded area above activation energy represent?
On an energy distribution curve, what does the shaded area above activation energy represent?
Particles with enough energy to react
In an endothermic reaction, how does product energy compare to reactant energy?
In an endothermic reaction, how does product energy compare to reactant energy?
Products have higher energy
What is the main function of a catalyst in a chemical reaction?
What is the main function of a catalyst in a chemical reaction?
Lower activation energy
How does a catalyst increase the proportion of successful collisions?
How does a catalyst increase the proportion of successful collisions?
By lowering the activation energy barrier
What does a catalyst form during the reaction mechanism?
What does a catalyst form during the reaction mechanism?
Intermediate compounds
What happens to the catalyst at the end of a catalysed reaction?
What happens to the catalyst at the end of a catalysed reaction?
Regenerated unchanged
Which of these is an example of a biological catalyst?
Which of these is an example of a biological catalyst?
Enzymes