Catalytic Property

Frequently Asked Questions (FAQs)

Join ALLEN!

(Session 2026 - 27)

Name

Mobile Number

Class

Choose class

Goal

Choose your goal

Preferred Programs

Preferred Mode

State

Choose State

I agree to

I authorise ALLEN Career Institute Pvt Ltd to send me regular updates via Phone calls, Whatsapp, SMS, Robocalls (Automated Calls), Emails, or on postal address.

Catalysis Property

1.0Introduction

Catalysis refers to the process by which a substance (a catalyst) accelerates a chemical reaction without being consumed in the overall response. The catalytic property is the inherent ability of a catalyst to lower the activation energy and increase the reaction rate, while remaining chemically unchanged at the end of the reaction.

2.0Types of Catalysis

(a) Homogeneous Catalysis

Reactants and catalysts are in the same phase (usually solution).
Example: Hydrolysis of an ester in the presence of H⁺ (acid).

(b) Heterogeneous Catalysis

Reactants and catalysts are in different phases.
Example: Hydrogenation of alkenes using Ni, Pt, or Pd catalyst.

(c) Autocatalysis

One of the reaction products itself acts as a catalyst.
Example: Oxidation of oxalic acid by KMnO₄, where Mn²⁺ acts as an autocatalyst.

(d) Enzyme Catalysis (Biocatalysis)

Enzymes (biological catalysts) accelerate biochemical reactions.
Example: Breakdown of hydrogen peroxide by the catalase enzyme.

3.0Catalytic Property of Transition Elements

(a) Role of d-block elements

Transition metals and their compounds are excellent catalysts due to:
1. Variable oxidation states (allowing electron transfer).
2. Ability to adsorb reactants on their surface.
3. Formation of intermediate compounds.

(b) Examples of catalytic reactions

Fe in the Haber process (N₂ + 3H₂ → 2NH₃).
V₂O₅ in the Contact process (2SO₂ + O₂ → 2SO₃).
Ni in the hydrogenation of alkenes.
MnO₂ in the decomposition of H₂O₂.

(c) Mechanism of catalytic activity in transition metals

Adsorption of reactants on the catalyst surface.
Bond weakening of reactants.
Formation of intermediates.
Desorption of products regenerating the catalyst.

4.0Applications of Catalysis in Chemistry

(a) Industrial processes

Haber process (NH₃ production) – Fe catalyst.
Contact process (H₂SO₄ production) – V₂O₅ catalyst.
Hydrogenation (margarine production) – Ni catalyst.

(b) Biological systems

Enzyme catalysis controls vital reactions (respiration, digestion).

(c) Environmental significance

Catalytic converters in automobiles reduce harmful emissions.

Frequently Asked Questions (FAQs)

Join ALLEN!

(Session 2026 - 27)

Name

Mobile Number

Class

Choose class

Goal

Choose your goal

Preferred Programs

Preferred Mode

State

Choose State

I agree to

I authorise ALLEN Career Institute Pvt Ltd to send me regular updates via Phone calls, Whatsapp, SMS, Robocalls (Automated Calls), Emails, or on postal address.

Catalysis Property

1.0Introduction

Catalysis refers to the process by which a substance (a catalyst) accelerates a chemical reaction without being consumed in the overall response. The catalytic property is the inherent ability of a catalyst to lower the activation energy and increase the reaction rate, while remaining chemically unchanged at the end of the reaction.

2.0Types of Catalysis

(a) Homogeneous Catalysis

Reactants and catalysts are in the same phase (usually solution).
Example: Hydrolysis of an ester in the presence of H⁺ (acid).

(b) Heterogeneous Catalysis

Reactants and catalysts are in different phases.
Example: Hydrogenation of alkenes using Ni, Pt, or Pd catalyst.

(c) Autocatalysis

One of the reaction products itself acts as a catalyst.
Example: Oxidation of oxalic acid by KMnO₄, where Mn²⁺ acts as an autocatalyst.

(d) Enzyme Catalysis (Biocatalysis)

Enzymes (biological catalysts) accelerate biochemical reactions.
Example: Breakdown of hydrogen peroxide by the catalase enzyme.

3.0Catalytic Property of Transition Elements

(a) Role of d-block elements

Transition metals and their compounds are excellent catalysts due to:
1. Variable oxidation states (allowing electron transfer).
2. Ability to adsorb reactants on their surface.
3. Formation of intermediate compounds.

(b) Examples of catalytic reactions

Fe in the Haber process (N₂ + 3H₂ → 2NH₃).
V₂O₅ in the Contact process (2SO₂ + O₂ → 2SO₃).
Ni in the hydrogenation of alkenes.
MnO₂ in the decomposition of H₂O₂.

(c) Mechanism of catalytic activity in transition metals

Adsorption of reactants on the catalyst surface.
Bond weakening of reactants.
Formation of intermediates.
Desorption of products regenerating the catalyst.

4.0Applications of Catalysis in Chemistry

(a) Industrial processes

Haber process (NH₃ production) – Fe catalyst.
Contact process (H₂SO₄ production) – V₂O₅ catalyst.
Hydrogenation (margarine production) – Ni catalyst.

(b) Biological systems

Enzyme catalysis controls vital reactions (respiration, digestion).

(c) Environmental significance

Catalytic converters in automobiles reduce harmful emissions.

Frequently Asked Questions (FAQs)

What is meant by the catalytic property of transition metals?

Which transition metals are commonly used as catalysts?

What is the difference between homogeneous and heterogeneous catalysis?

What are promoters and poisons in catalysis?

Is catalysis reversible?

Join ALLEN!

Catalysis Property

1.0Introduction

2.0Types of Catalysis

(a) Homogeneous Catalysis

(b) Heterogeneous Catalysis

(c) Autocatalysis

(d) Enzyme Catalysis (Biocatalysis)

3.0Catalytic Property of Transition Elements

(a) Role of d-block elements

(b) Examples of catalytic reactions

(c) Mechanism of catalytic activity in transition metals

4.0Applications of Catalysis in Chemistry

(a) Industrial processes

(b) Biological systems

(c) Environmental significance

Table of Content

Frequently Asked Questions (FAQs)

What is meant by the catalytic property of transition metals?

Which transition metals are commonly used as catalysts?

What is the difference between homogeneous and heterogeneous catalysis?

What are promoters and poisons in catalysis?

Is catalysis reversible?

Join ALLEN!

Catalysis Property

1.0Introduction

2.0Types of Catalysis

(a) Homogeneous Catalysis

(b) Heterogeneous Catalysis

(c) Autocatalysis

(d) Enzyme Catalysis (Biocatalysis)

3.0Catalytic Property of Transition Elements

(a) Role of d-block elements

(b) Examples of catalytic reactions

(c) Mechanism of catalytic activity in transition metals

4.0Applications of Catalysis in Chemistry

(a) Industrial processes

(b) Biological systems

(c) Environmental significance

Table of Content