Building Materials - Study Mode

Explanation

Solution: Correct Answer: Option C: Both (i) and (iii) (i) Sedimentary rock – ✅ Correct Sandstone is definitely a sedimentary rock . It forms through the compaction and cementation of sand-sized mineral particles over time, often in layers. (ii) Aqueous rock – ❌ Not a standard classification While sandstone forms in environments involving water (like rivers, lakes, or oceans), the term “aqueous rock” is not a formal geological classification . In geology, rocks are usually grouped as igneous, sedimentary, or metamorphic . “Aqueous” may be used descriptively, but not as a standalone rock type. (iii) Siliceous rock – ✅ Correct Sandstone is primarily composed of quartz , which is silicon dioxide (SiO₂) . This makes sandstone a siliceous rock due to its high silica content. Final Conclusion: Sandstone is a sedimentary and siliceous rock, but not formally an aqueous rock. Therefore, the correct answer is Option C: Both (i) and (iii) .