Practice Presence Of A Catalyst (2.5) - Unit 6: Chemical Kinetics

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

5 sample questions

Question 1.
What is a catalyst?
Show hintHide hint
Remember, it speeds up reactions without being consumed.
Question 2.
Name one type of catalyst.
Show hintHide hint
Think about the phases they exist in.
3Question 3.
What is the primary function of a catalyst?
- To increase activation energy
- To lower activation energy
- To change the equilibrium
Show hintHide hint
Think about what catalysts do in reactions.
4Question 4.
Catalysts are consumed in the reactions they facilitate.
- True
- False
Show hintHide hint
Remember that they can be reused.
Question 5.
A reaction has an activation energy of 100 kJ/mol. Using a catalyst, this energy is lowered to 70 kJ/mol. Calculate the factor by which the reaction rate might increase, assuming transition states are reached more often with the lower activation energy.
Show hintHide hint
Consider how often molecules hit the transition state.

4 more questions in this section. Enroll free to practise them all.