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.)
Reaction of benzoyl chloride with H2 and Pd in presence of `BaSO_(4)` and S yields ........... .. and reaction is known as ............. reaction.

Explanation

To solve the question, we need to identify the products of the reaction between benzoyl chloride and hydrogen (H2) in the presence of palladium (Pd) and barium sulfate (BaSO4) and also name the reaction.

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants are benzoyl chloride (C6H5COCl) and hydrogen (H2) in the presence of a catalyst (Pd) and BaSO4.

2. **Understand the Reaction**: Benzoyl chloride is an acid chloride. When it reacts with hydrogen in the presence of a catalyst, it undergoes reduction. The chlorine atom in benzoyl chloride is replaced by a hydrogen atom.

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