2025 · Q72
Consider the following statements with reference to salt weathering :
- 1Salts in rocks expand due to thermal action, hydration and crystallization.
- 2Salts like calcium, sodium, magnesium and barium have a tendency to expand.
- 3Salt weathering is a typical example of chemical weathering.
Which of the statements given above is/are correct?
indian-world-geographygeomorphology
- A1 only
- B1 and 2 only
- C2 and 3 only
- D1, 2 and 3
Explanation
Salts in rocks expand through thermal action, hydration and crystallisation, so statement 1 is correct. Salts of calcium, sodium, magnesium and barium indeed have a tendency to expand on crystallisation/hydration, so statement 2 is correct. Salt weathering (haloclasty) is a type of physical/mechanical weathering, not chemical weathering, so statement 3 is incorrect. Hence 1 and 2 only are correct.