BPSC – Combined Competitive Examination · પ્રશ્ન 93
Corundum and cryolite are important ores of:
જવાબ બતાવો અને સમજૂતી
જવાબ: (A) Aluminium
સમજૂતી
Both are aluminium minerals; cryolite is used as a flux in aluminium extraction.
- (A) સાચો
Correct: corundum (Al₂O₃) and cryolite (Na₃AlF₆) contain aluminium.
- (B) ખોટો
Wrong: silver ores include argentite.
- (C) ખોટો
Wrong: tin ore is cassiterite.
- (D) ખોટો
Wrong: iron ores are haematite, magnetite etc.