BPSC – Combined Competitive Examination · ಪ್ರಶ್ನೆ 93
Corundum and cryolite are important ores of:
ಉತ್ತರ ತೋರಿಸು ಮತ್ತು ವಿವರಣೆ
ಉತ್ತರ: (A) Aluminium
ವಿವರಣೆ
Both are aluminium minerals; cryolite is used as a flux in aluminium extraction.
- (A) ಸರಿ
Correct: corundum (Al₂O₃) and cryolite (Na₃AlF₆) contain aluminium.
- (B) ತಪ್ಪು
Wrong: silver ores include argentite.
- (C) ತಪ್ಪು
Wrong: tin ore is cassiterite.
- (D) ತಪ್ಪು
Wrong: iron ores are haematite, magnetite etc.