Formula of Chile saltpetre is__________________?

Correct answer: A. NaNO3

  • A. NaNO3
  • B. CaCO3
  • C. Ba (NO3)2
  • D. NH4Cl

Explanation

Chile saltpetre is the mineral name for sodium nitrate, NaNO3, a naturally occurring nitrate deposit from Chile. Calcium carbonate is limestone, barium nitrate is a different nitrate salt, and ammonium chloride is sal ammoniac. Students may select a by recognizing the nitrate group but forgetting that Chile saltpetre specifically means sodium nitrate.

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