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)
Ether forms...........salts with concentrated acids at low temperature.

Explanation

To solve the question, we need to fill in the blank with the appropriate word from the options provided. The statement is:

"Ethers form _______ salts with concentrated acids at low temperature."

### Step-by-Step Solution:

1. **Understanding the Reaction**: Ethers are organic compounds that contain an ether functional group, characterized by an oxygen atom connected to two alkyl or aryl groups. When ethers react with concentrated acids, they can form salts.

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