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)
A mixture of conc. HCl and anhydrous `ZnCl_(2)` is called ............ reagent.

Explanation

To solve the question, we need to fill in the blank with the correct term based on the provided options. The statement we are working with is:

"A mixture of conc. HCl and anhydrous ZnCl2 is called ............ reagent."

1. **Identify the components**: The mixture consists of concentrated hydrochloric acid (HCl) and anhydrous zinc chloride (ZnCl2).

2. **Recall the purpose of the mixture**: This mixture is commonly known in organic chemistry for its ability to distinguish between different types of alcohols (primary, secondary, and tertiary).

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