Fill in the blanks by choosing the appropriate word/words from those given in the brackets.
(Monohydric, dihydric, trihydric, nitration, sulfonation, resonance stabilizaton, acidic, basic, `FeCl_(3)ZnCl_(2)`, more, less, aldehydes, ketones, Tollens' reagent, Luca's reagent, o-nitrophenol, p-nitrophenol, ethene, diethyl ether, fit, unfit, be, not be, `O_(2),Cl_(2)`, alkyl halides, oxonium, hydronium, alkyl, lone pairs of electrons, ethyl iodide, ethyl hydrogen sulfate, perchlorodiethyl ether, methyl iodide, ethyl hydrogensulfate, perchlorodiethyl ether, methyl iodide, dialkyl, hydrogen bonding, violet, green)
The catalytic dehydrogenation of secondary alcohols yields .............

Explanation

To solve the question, we need to fill in the blank in the statement: "The catalytic dehydrogenation of secondary alcohols yields ______."

### Step-by-Step Solution:

1. **Understand the Process**: The question asks about the catalytic dehydrogenation of secondary alcohols. Dehydrogenation is a chemical reaction that involves the removal of hydrogen from a molecule.

2. **Identify the Type of Alcohol**: Secondary alcohols are alcohols where the hydroxyl (-OH) group is attached to a carbon atom that is connected to two other carbon atoms.

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