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Chemical Sciences Colloid and Surface Chemistry Virtual Lab Experiments

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Aim

Theory

Objective

Pretest

Procedure

Simulation

Posttest

Assignment

References

Feedback

Study of the Catalytic Effects of Finely Divided Particles

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1. Which of the following will have highest catalytic activity:

a: 100 cubes of catalyst 1mm each side. Explanation

Explanation

b: 100 spheres of catalyst of radius 1mm each. Explanation

Explanation

c: 100 hemispheres of catalyst of radius 1mm each. Explanation

Explanation

d: 100 cones of catalyst of radius and height 1 mm each. Explanation

Explanation

2. How do catalysts work?

a: Lowers activation energy Explanation

Explanation

b: Increases activation energy Explanation

Explanation

c: Make more reactants Explanation

Explanation

d: Mixes the reactants properly. Explanation

Explanation

3. What does a positive catalyst do?

a: Slows a reaction Explanation

Explanation

b: Speeds up a reaction Explanation

Explanation

c: Inhibits a reaction Explanation

Explanation

d: Improves other catalyst Explanation

Explanation

4. Which of the following is incorrect for a catalyst?

a: Bio-chemical reactions are mostly catalysed by enzymes Explanation

Explanation

b: Catalyst does not start a reaction Explanation

Explanation

c: Catalyst changes the equilibrium constant of a reaction Explanation

Explanation

d: Co-enzymes increase the activity of an enzyme Explanation

Explanation

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