BPSC – Combined Competitive Examination · প্রশ্ন 93
Corundum and cryolite are important ores of:
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (A) Aluminium
ব্যাখ্যা
Both are aluminium minerals; cryolite is used as a flux in aluminium extraction.
- (A) সঠিক
Correct: corundum (Al₂O₃) and cryolite (Na₃AlF₆) contain aluminium.
- (B) ভুল
Wrong: silver ores include argentite.
- (C) ভুল
Wrong: tin ore is cassiterite.
- (D) ভুল
Wrong: iron ores are haematite, magnetite etc.