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In which of the following reactions hete...

In which of the following reactions heterogeneous catalysis is involved?
(i) `2SO_(2)(g)+O_(2)(g) overset(NO(g))(to) 2SO_(3)(g)`
(ii) `2SO_(2)(g) overset(Pt(s))(to) 2SO_(3)(g)`
(iii) `N_(2)(g)+3H_(2)(g) overset(Fe(s))(to) 2NH_(3)(g)`
(iv) `CH_(3)COOCH_(3)(l)+H_(2)O(l) overset(HCl(l))(to)CH_(3)COOH(aq)+CH_(3)OH(aq)`

A

(ii), (iii)

B

(ii), (iii) and (iv)

C

(i), (ii) and (iii)

D

(iv)

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the given reactions involve heterogeneous catalysis, we need to understand the definitions of homogeneous and heterogeneous catalysis: 1. **Homogeneous Catalysis**: The reactants and the catalyst are in the same phase (either all gases or all liquids). 2. **Heterogeneous Catalysis**: The reactants and the catalyst are in different phases (for example, a solid catalyst with gaseous reactants). Now, let's analyze each reaction one by one: ### Step 1: Analyze Reaction (i) **Reaction**: `2SO_(2)(g) + O_(2)(g) overset(NO(g))(to) 2SO_(3)(g)` - **State of Reactants**: Both SO₂ and O₂ are gases. - **State of Catalyst**: NO is also a gas. **Conclusion**: All components are in the same phase (gaseous), so this is an example of homogeneous catalysis. ### Step 2: Analyze Reaction (ii) **Reaction**: `2SO_(2)(g) overset(Pt(s))(to) 2SO_(3)(g)` - **State of Reactants**: SO₂ is a gas. - **State of Catalyst**: Pt (platinum) is a solid. **Conclusion**: The reactants (gaseous) and the catalyst (solid) are in different phases, indicating this is an example of heterogeneous catalysis. ### Step 3: Analyze Reaction (iii) **Reaction**: `N_(2)(g) + 3H_(2)(g) overset(Fe(s))(to) 2NH_(3)(g)` - **State of Reactants**: N₂ and H₂ are gases. - **State of Catalyst**: Fe (iron) is a solid. **Conclusion**: The reactants (gaseous) and the catalyst (solid) are in different phases, indicating this is also an example of heterogeneous catalysis. ### Step 4: Analyze Reaction (iv) **Reaction**: `CH_(3)COOCH_(3)(l) + H_(2)O(l) overset(HCl(l))(to) CH_(3)COOH(aq) + CH_(3)OH(aq)` - **State of Reactants**: Both CH₃COOCH₃ and H₂O are liquids. - **State of Catalyst**: HCl is also a liquid. **Conclusion**: All components are in the same phase (liquid), so this is an example of homogeneous catalysis. ### Final Conclusion: Based on the analysis: - **Heterogeneous Catalysis** is involved in reactions (ii) and (iii). - **Homogeneous Catalysis** is involved in reactions (i) and (iv). ### Answer: The reactions that involve heterogeneous catalysis are: - (ii) `2SO_(2)(g) overset(Pt(s))(to) 2SO_(3)(g)` - (iii) `N_(2)(g) + 3H_(2)(g) overset(Fe(s))(to) 2NH_(3)(g)` ---
To determine which of the given reactions involve heterogeneous catalysis, we need to understand the definitions of homogeneous and heterogeneous catalysis: 1. **Homogeneous Catalysis**: The reactants and the catalyst are in the same phase (either all gases or all liquids). 2. **Heterogeneous Catalysis**: The reactants and the catalyst are in different phases (for example, a solid catalyst with gaseous reactants). Now, let's analyze each reaction one by one: ### Step 1: Analyze Reaction (i) ...
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