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(Increases, decreases, positive, efficient, 68, non-efficient, no `alpha`-hydrogen, negative, Rosenmund's, greater, Cannizzaro, 74, commonion effect, lesser, buffer action, diamagnetic, paramagnetic)
Benzaldehyde undergoes________in reaction on treatment with concentrated sodium hydroxide because it has_________atom.

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To solve the question, we need to analyze the behavior of benzaldehyde when treated with concentrated sodium hydroxide (NaOH) and identify the relevant chemical concepts involved. ### Step-by-Step Solution: 1. **Identify the Reaction Type**: Benzaldehyde (C₇H₆O) is an aromatic aldehyde. When treated with concentrated sodium hydroxide, it undergoes a specific type of reaction known as the Cannizzaro reaction. **Hint**: Look for reactions that occur with aldehydes lacking alpha-hydrogens. ...
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