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Chemical Sciences Colloid and Surface Chemistry Virtual Lab Experiments

Aim

Theory

Objective

Pretest

Procedure

Simulation

Posttest

Assignment

References

Feedback

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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