Complete the following reactions :
`CH_(3)CH=CH_(2)+H_(2)overset("Pd,Pt or"Ni)rarr`?

Explanation

To complete the reaction of propene (CH₃CH=CH₂) with hydrogen (H₂) in the presence of a catalyst (Pd, Pt, or Ni), we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in this reaction are propene (CH₃CH=CH₂) and hydrogen gas (H₂).

2. **Understand the Reaction Type**:
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