Question

According to the Lux-Flood $Xe{F_6}$ behaves as:
(A) An oxidizing agent
(B) An acid (oxide ion acceptor)
(C) A base
(D) A reducing agent

Answer 1

Hint: Lux flood definition tells us that an oxide ion acceptor is an acid and an oxide ion donor is a base. Lux-flood definition was proposed by German Hermann Lux and was further improved by Hakon Flood Circa. This definition for acid-base is used in modern geochemistry and for the electrochemistry of molten salts.

Complete step by step answer:
Acids and bases have many definitions varying according to the different concepts. Some of the acid-base theories and concepts are:
Arrhenius acid and base theory
Bronsted lowry Acids – Bases.
Lewis Acids and bases.
Lux-flood acid-base definition.
i). Arrhenius Theory
Arrhenius theory explains that the substance that can dissociate in water to yield hydrogen ions (${H^ + }$) is termed as an acid whereas the substance that dissociates in water to give hydroxide ions is a base. Example: $HCl$ dissociates into ${H^ + }$ and $C{l^ - }$
$NaOH$ dissociates into $N{a^ + }$ and $O{H^ - }$

ii). Bronsted Lowry Theory:
It defines that an acid is a proton donor and a base is a proton acceptor. When an acid loses a proton the remaining. Part can be a proton acceptor and is called a conjugate base. Similarly, when a base accepts a proton, the remaining part can be a proton donor and is known as conjugate acid.

iii). Lewis Theory:
Lewis Theory deals with the acceptance and the donation of the electrons. The substance is an acid if it accepts a pair of electrons and otherwise if it donates then it is a base.

iv).Lux-flood definition:
Lux-flood definition defines that if a substance accepts oxide (${O^{2 - }}$) ion then it is an acid and if it donates then it is a base.
In the case of $Xe{F_6}$, Lux-flood definition says that $Xe{F_6}$ is a strong acid.

So, the correct answer is Option B .

Note:
The lux-flood concept is based on the oxide-ion concept; thus, it means that a substance must have an oxide ion in order to explain its acidity or basicity. Moreover, it is only limited to molten oxides.