Practice Catalytic Properties (4.3.12) - The d– and f-Block Elements - CBSE 12 Chemistry Part 1

Practice: Catalytic Properties

Lesson 4.3.12The d– and f-Block Elements

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8 questions

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Exercise
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a catalyst?
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Think about its role in chemical reactions.
Question 2.
Name one example of a transition metal used as a catalyst.
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Consider processes for synthesizing ammonia.
3Question 3.
What role do transition metals play in catalysis?
- They lower the temperature of reactions
- They increase reaction rates without being consumed
- They always increase the energy of reactions
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Consider what happens to the catalyst after the reaction.
4Question 4.
True or False: Transition metals can only exist in one oxidized state.
- True
- False
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Think about their roles in different reactions.
Question 5.
Given a reaction system where transition metals are used as catalysts, describe a scenario where autoregeneration of catalyst plays a crucial role. How do oxidation states affect this scenario?
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Think about how iron changes during ammonia synthesis.
Question 6.
Explain the significance of using transition metals in catalytic processes in terms of economic and environmental impact.
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Consider how reaction conditions affect resource use.

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