alleryStart learning →Industrially, dioxygen is obtained from air by what process?
ARoasting of sulfide ores
BElectrolysis of brine
CDistilling liquid air
DThermal cracking of oil
Answer & Solution
Correct answer: C. Distilling liquid air
Air is freed of CO2 and water vapour, liquified and then fractionally distilled.
Keep practising Elements of Groups 16, 17 and 18
Browse all Elements of Groups 16, 17 and 18 questions for MHT-CET, or explore more Chemistry topics.
Related questions
Why are halogens never found free in nature?What percentage by mass of the earth's crust is sulfur?Which interhalogen in glacial acetic acid is Wijs solution?In an interhalogen compound XX'n, which atom is X?Hydrochloric acid reacting with ammonia gives what visible product?Moist HCl gas can be dried by passing it through what?Aqua regia is a mixture of conc. HCl and conc. HNO3 in what ratio?Who first prepared hydrogen chloride by heating salt with conc. sulfuric acid in 1648?