Question

The following are catalysts and their respective processes/reactions. The wrong pair is:

• A. \([RhCl(PPh_3)_3]\) : Hydrogenation
• B. \(TiCl_4 + Al(C_2H_5)_3\) : Polymerisation
• C. \(V_2O_3\) : Haber-Bosch process
• D. Nickel : Hydrogenation

Hint:

Remember: Fe → Haber Process, \(V_2O_5\) → Contact Process, Ni → Hydrogenation, Ziegler-Natta Catalyst → Polymerisation.

Answer 1

The Correct Option is C

Concept: Many industrial processes use specific catalysts. Knowledge of important catalysts is frequently tested in coordination chemistry and industrial chemistry.

Step 1: Checking option (A). \[ [RhCl(PPh_3)_3] \] is Wilkinson's catalyst. It is used for hydrogenation of alkenes. Hence this pair is correct.

Step 2: Checking option (B). \[ TiCl_4 + Al(C_2H_5)_3 \] forms Ziegler-Natta catalyst. It is used for polymerisation of alkenes. Hence this pair is correct.

Step 3: Checking option (C). The Haber-Bosch process for ammonia manufacture uses finely divided iron catalyst with promoters such as \[ K_2O,\quad Al_2O_3 \] and not \(V_2O_3\). Vanadium pentoxide \[ V_2O_5 \] is used in the Contact Process. Therefore this pair is incorrect.

Step 4: Checking option (D). Nickel is a common hydrogenation catalyst. Example: \[ \text{Vegetable oil} \rightarrow \text{Vanaspati ghee} \] Hence this pair is correct. Therefore, \[ \boxed{(C)} \] is the wrong pair.