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

Step 1: Match V₂O₅.  

Vanadium pentoxide is used as a catalyst in the Contact process. 
In this process: $$ SO_2 $$ is oxidised to: $$ SO_3 $$ Therefore: A – III 


Step 2: Match Fe. 

Iron is used as a catalyst in Haber’s process. 
In this process ammonia is prepared from: $$ N_2 + H_2 $$ Therefore: B – I 


Step 3: Match PdCl₂. 

Palladium chloride is used in catalytic hydrogenation/dehydrogenation type reactions involving unsaturated hydrocarbons. 
Here it matches with conversion involving ethyne to ethene. Therefore: C – IV 


Step 4: Match Ni complex. 

Nickel complexes are used in polymerisation of alkynes. Therefore: D – II 


Final Answer: 
A – III, B – I, C – IV, D – II