Q. Consider the following compounds: - Sodium chloride
- Calcium carbonate
- Ammonium nitrate
- Silicon dioxide
How many of the above compounds occur naturally as minerals?
Answer:
3 only
Notes: Sodium chloride occurs naturally as rock salt (halite), calcium carbonate as limestone/marble, and silicon dioxide as quartz. Ammonium nitrate is generally produced synthetically and does not occur naturally in significant mineral quantities. Therefore, only three of the above compounds are found naturally as minerals.