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The molecular formula of cryolite is ____________

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The molecular formula of cryolite is ____________

(a) Al2O3

(b) Fe2O3

(c) Na3AlF6

(d) Na3MgI6

I have been asked this question in an internship interview.

My query is from Faraday’s Laws of Electrolysis in division Corrosion, Electrolysis, Fuel Cells and Batteries of Engineering Chemistry II

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Right choice is (c) Na3AlF6

For explanation: The molecular formula of cryolite is Na3AlF6. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.

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