Give balanced equation for the name reaction:
Rosenmund reaction.

Explanation

To provide a balanced equation for the Rosenmund reaction, we need to understand the components involved in this reaction and how they interact.

### Step-by-Step Solution:

1. **Identify the Reactants**: The Rosenmund reaction involves an acyl chloride (RCOCl) and hydrogen gas (H₂). The acyl chloride is the starting material that will be converted into an aldehyde.

2. **Identify the Catalyst**: The reaction is facilitated by a catalyst, which in this case is palladium (Pd) supported on barium sulfate (BaSO₄). The barium sulfate acts to reduce the activity of palladium, preventing over-reduction.

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