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Industrial Preparation: Contact process

What does a c...

Question

What does a catalyst do in a reaction?

A

Alters the rate of the reaction

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B

Provides a surface for gases to react

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C

Increases the proportion of products in the equilibrium mixture

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D

Remains unaltered chemically

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Solution

The correct options are
A
Alters the rate of the reaction

B
Provides a surface for gases to react

D
Remains unaltered chemically

A catalyst increases or decreases the rate of a reaction, but it cannot change the proportion of the equilibrium mixture as that depends on other factors.

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Q. Which of the following factors are responsible for the increase in the rate of a surface catalyzed reaction?
(i) A catalyst provides proper orientation for the reactant molecules to react.
(ii) The heat of adsorption of reactants on a catalyst helps reactant molecules to overcome activation energy.
(iii) The catalyst increases the activation energy of the reaction.

Q. Assertion :When a catalyst is added to a reaction mixture in equilibrium the amount of the products increases, Reason: The forward reaction becomes faster on adding the catalyst.

Q. Assertion :When a catalyst is added to a reaction mixture in equilibrium, the amount of the products increases. Reason: The forward reaction becomes faster/slower on adding the catalyst.

A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of

Q. Which of the following factors are responsible for the increase in the rate of a surface catalysed reaction?
I. A catalyst provides proper orientation for the reactant molecules to react
II. Heat of adsorption of reactants on a catalyst helps reactant molecules to.overcome activation energy
III. The catalyst increases the activation energy of the reaction
IV. Adsorption increases the local concentration of reactant molecules on the surface of the catalyst
Select the correct answer using the codes given below:

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