Selected MCQ

Current Question
Which mineral is hardest?
  • A. Quartz
  • B. Diamond
  • C. Gypsum
  • D. Talc
Correct Answer: B
Explanation:
Diamond ranks highest on Mohs scale.
Related Question 1
The mineral calcite reacts vigorously with dilute hydrochloric acid because it is a:
  • A. Silicate
  • B. Sulfide
  • C. Carbonate
  • D. Oxide
Correct Answer: C
Explanation:
Carbonates effervesce by releasing (CO_2) upon acid reaction.