Fill in the blank by choosing the appropriate word/words from those given in the brackets.
(acetaldehyde, formaldehyde, benzaldehyde, yellow, white, violet, Cannizzaro's, Liebermann, no `alpha`-hydrogen atom, `1alpha`-hydrogen atom, `2alpha`-hydrogen atoms, aldol, `beta`-hydroxy aldehyde, aldol condensation, mixed condensation, + I,-I, -M,+ M. decreases, increases, benzalchloride, PCI, SOCh. sec, alcohol, tert, alcohol, phenylhydrozone, semicarbazone, more, less, acetals, ketals, silver mirror, test, urotropine, acetaldehyde cyanohydrin, lactic acid, benzoic acid, Sodalime, ethanoic acid, propanoic acid, electrolysis, Kolbe's electrolytic reaction, carbon dioxide, water, amides, alpha, halogen, phosphorus, weaker, stronger, ethyl alcohol, dibasic,monobasic, 2,2-dimethylpropanoic acid, `CH_(3)COCI`, acetic acid, `CH_(3)CH_(2)CH_(2)COOK`, enatiomers, diastereo, `K_(a)` `pk_(a)`, methanoic acid, higher, lower.)
The oxidation of toluene with .............. gives benzaldehyde but with .............. gives benzoic acid.

Explanation

To solve the question, we need to fill in the blanks with the appropriate reagents that can oxidize toluene to benzaldehyde and then to benzoic acid.

### Step-by-Step Solution:

1. **Identify the oxidation of toluene to benzaldehyde**:
- Toluene (C6H5CH3) can be oxidized to benzaldehyde (C6H5CHO) using a moderate oxidizing agent.
- The reagent that is commonly used for this transformation is **CrO2Cl2** (Chromyl chloride) in an acidic medium.

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