UPSC NDA I 2021 General Ability Solved Paper

The correct answer is hydration.
Key Points
- Minerals in rock can also react with water in a process called hydration.
- Some minerals can absorb water into their structure, causing their volume to expand and put stress on the rock.
- Over time, this chemical reaction can lead to a physical weakening of the rock.
- Rocks can also be subjected to dissolution, the process by which a mineral completely dissolves in water.