Extraction of Metals - Result Question 7
####7. The ore that contains the metal in the form of fluoride is
(2019 Main, 9 April I)
(a) magnetite
(b) sphalerite
(c) malachite
(d) cryolite
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Solution:
- Cryolite ore $\left(Na _3 AlF _6\right.$, sodium hexafluoroaluminate $)$ contain fluorine while other given options such as malachite $\left(Cu _2(CO) _3(OH) _2\right)$, sphalerite $((Zn, Fe) S)$ and bauxite $\left(Al _2 O _3\right)$ does not contain fluorine.
