Correct Answer: Tungsten
Subject: geography
Explanation: • Wolframite is the chief source/ore of Tungsten. • Scheelite and Hubnerite are other major ores. • Tungsten is a heavy metal known for its high resistivity and melting point. • Copper comes from Cuprite/Malachite; Zinc from Calamine; Tin from Cassiterite. • Trick: 'Wolfram (W) is the chemical symbol for Tungsten'. • It is mainly used in making steel alloys and filaments.
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