Catalysts (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the key property of a catalyst during a chemical reaction?
What is the key property of a catalyst during a chemical reaction?
It speeds up reactions without being used up
How do catalysts increase the rate of chemical reactions?
How do catalysts increase the rate of chemical reactions?
They lower the activation energy needed
What effect does a catalyst have on the overall energy change of a reaction?
What effect does a catalyst have on the overall energy change of a reaction?
No effect - it stays the same
What defines homogeneous catalysis?
What defines homogeneous catalysis?
Catalyst in same phase as reactants
What are the three steps of heterogeneous catalysis in order?
What are the three steps of heterogeneous catalysis in order?
Adsorption, reaction, desorption
What happens during adsorption in heterogeneous catalysis?
What happens during adsorption in heterogeneous catalysis?
Reactants attach and bonds are weakened
Which metal in catalytic converters catalyses the reaction between CO and NO?
Which metal in catalytic converters catalyses the reaction between CO and NO?
Rhodium
What is the key characteristic of enzyme specificity?
What is the key characteristic of enzyme specificity?
Each enzyme catalyses only one reaction
By what factor can enzymes increase reaction rates compared to ordinary chemical catalysts?
By what factor can enzymes increase reaction rates compared to ordinary chemical catalysts?
to times
What does the enzyme amylase catalyse?
What does the enzyme amylase catalyse?
Breakdown of starch into maltose