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Hydrofluoric acid: Quiz


Question 1: Although bulk fluorite is a suitable precursor, most HF is produced as a by-product of the production of ________, which is derived from the mineral apatite.
Sulfuric acidOxygenPhosphoric acidCitric acid

Question 2: [8] In the body, hydrofluoric acid reacts with the ubiquitous biologically important ________ Ca2+ and Mg2+.
IonLithium-ion batteryHalf cellElectrolyte

Question 3: Hydrofluoric acid (HF) is a solution of hydrogen fluoride in ________.
OxygenWaterEarthWater resources

Question 4: The acid hydrolysis of fluorite-containing minerals generates an impure gas stream consisting of ________ (from the H2SO4), water, and HF, as well as particulates.
Sulfur dioxideSulfuric acidAcetic acidHydrogen sulfide

Question 5: Many organofluorinefluoropolymers, ________, and refrigerants such as freon.
Organofluorine chemistryFluorocarbonPerfluorooctanoic acidOxygen

Question 6: A molten mixture of these solids serve as high temperature solvent for the production of metallic ________.

Question 7: The FHF anion is stabilized by the very strong hydrogen–fluorine ________.
Chemical bondHydrogen bondDipolar bondChemical polarity

Question 8: In a standard oil refinery process known as alkylation, isobutane is alkylated with low-molecular-weight ________ (primarily a mixture of propylene and butylene) in the presence of a strong acid catalyst, hydrofluoric acid.

Question 9: It removes oxide impurities from stainless steel, a process called pickling, and silicon wafers in the ________ industry.
SemiconductorCondensed matter physicsPhysicsQuantum mechanics

Question 10: Other inorganic fluorides prepared from hydrofluoric acid include ________ and uranium hexafluoride.
Sodium monofluorophosphateSodium seleniteSodium selenateSodium fluoride


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