BPSC – Combined Competitive Examination · வினா 93
Corundum and cryolite are important ores of:
விடையைக் காட்டு & விளக்கம்
விடை: (A) Aluminium
விளக்கம்
Both are aluminium minerals; cryolite is used as a flux in aluminium extraction.
- (A) சரி
Correct: corundum (Al₂O₃) and cryolite (Na₃AlF₆) contain aluminium.
- (B) தவறு
Wrong: silver ores include argentite.
- (C) தவறு
Wrong: tin ore is cassiterite.
- (D) தவறு
Wrong: iron ores are haematite, magnetite etc.