Multiple choice

The ore of thorium is ______.

  1. ilmenite

  2. monazite

  3. pitchblende

  4. galena
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Monazite sand is the primary commercial source of thorium, containing thorium oxide along with rare earth elements. Ilmenite is a titanium ore, pitchblende (uraninite) is a uranium ore, and galena is a lead ore.

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