d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge - Page 216

Question 1076

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Why is finely divided iron used as a catalyst in Haber's Process?

It is cheaper than other metals
It is magnetic
It provides a large surface area for reactant adsorption
It is liquid at reaction conditions

Question 1077

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What is the primary function of a catalyst in a chemical reaction?

To change the equilibrium position
To increase the energy of the products
To lower the activation energy and increase the reaction rate
To be consumed in the reaction

Question 1078

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Which catalyst is used in the Contact Process mentioned in the text?

Finely divided iron
Nickel
Vanadium(V) oxide
Platinum

Question 1079

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What is the main characteristic that distinguishes a complex compound formed by a transition metal?

High ionic charge only
Small ionic size only
The involvement of d-orbitals in bond formation
Ionic bonding only

Question 1080

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How does the formation of bonds between reactants and the catalyst surface affect the reaction?

It decreases reactant concentration and increases activation energy
It has no effect on concentration or energy
It increases reactant concentration at the surface and lowers activation energy
It makes the reaction irreversible