Question

Match List-I with List-II. 

List-I	Transition metal/compound
A	V₂O₅
B	Fe
C	PdCl₂
D	Ni complex

 

List-II	Catalytic role
I	Preparation of ammonia from N₂/H₂ mixture
II	Polymerisation of alkynes
III	Oxidation of SO₂ to SO₃
IV	Preparation of ethyne to ethene

• A. A-II, B-I, C-IV, D-III
• B. A-IV, B-III, C-II, D-I
• C. A-II, B-I, C-III, D-IV
• D. A-III, B-I, C-IV, D-II

Hint:

Remember important catalysts: \(V_2O_5\) for Contact process and Fe for Haber process.

Answer 1

The Correct Option is D

To solve this question, we need to match the transition metals or compounds from List-I to their correct catalytic roles in List-II.

1. V₂O₅: Vanadium(V) oxide, or V₂O₅, is commonly used as a catalyst in the oxidation of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) in the contact process, which is a critical step in the industrial production of sulfuric acid. Therefore, the correct match is III (Oxidation of SO₂ to SO₃).
2. Fe: Iron is used as a catalyst in the Haber-Bosch process for synthesizing ammonia (NH₃) from nitrogen (N₂) and hydrogen (H₂). It provides an active surface for the reaction. Hence, the correct match is I (Preparation of ammonia from N₂/H₂ mixture).
3. PdCl₂: Palladium(II) chloride, PdCl₂, is often used in catalysis for reactions involving alkynes, such as hydrogenation. A common application is its role in the Lindlar catalyst, which is used to selectively hydrogenate alkynes to alkenes, such as converting ethyne (acetylene) to ethene. So, the correct match is IV (Preparation of ethyne to ethene).
4. Ni complex: Nickel complexes are widely used in the polymerization of alkynes. They can help in coordinating with alkynes, facilitating their polymerization. Therefore, the correct match is II (Polymerisation of alkynes).

Thus, the correct matching combination is:

A-III, B-I, C-IV, D-II