Which one of the following mineral does not contain oxygen ?
A. Haematite
B. Bauxite
C. Cryolite
D. Calcite
Answer: Option C
Solution(By Examveda Team)
Cryolite (Na3AlF6, sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.This Question Belongs to General Knowledge >> Chemistry
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