JEE Main · 2019 · 09 Apr 2019 · Shift 1 · General Principles and Processes of Isolation of Metals

The ore that contains the metal in the form of fluoride is:

(A)saphalerite
(B)malachite
(C)magnetite
(D)cryolite✓ Correct

Answer: (D)

Solution

Cryolite,

Na X_{3} AlF X_{6}

, holds its metal as a fluoride and is the one fluoride ore here; it serves as the molten flux in the electrolytic winning of aluminium. Sphalerite is

ZnS

, malachite is

CuCO X_{3} \cdot Cu (OH) X_{2}

and magnetite is

Fe X_{3} O X_{4}

, a sulphide, a carbonate and an oxide, none of them fluorides.

JEE Main · 2019 · 09 Apr 2019 · Shift 1 · Single correct option

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