NEET Chemistry: Catalysis questions with solutions

Q1. Raney nickel, which is used as a catalyst, is obtained:

1. by grinding solid nickel
2. by treating nickelaluminium alloy with dilute \( N a O H \)
3. by treating nickelaluminium alloy with dilute \( H C l \)
4. by heating nickel tetracarbonyl

Answer: by treating nickelaluminium alloy with dilute \( N a O H \)

Raney nickel is prepared by treating a nickel–aluminium alloy with dilute NaOH, which dissolves aluminium and leaves behind a highly porous nickel catalyst. This porous structure gives it a very large surface area and high catalytic activity.