Question:
In which one of the following regions the chemical weathering process is more dominant than the mechanical process?
In which one of the following regions the chemical weathering process is more dominant than the mechanical process?
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Chemical weathering involves the breakdown of rocks through chemical reactions such as hydrolysis, oxidation, carbonation and dissolution.
Updated On: Jun 16, 2026
- Glacier region
- Arid region
- Limestone region
- Humid region
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The Correct Option is D
Solution and Explanation
Concept:
Chemical weathering involves the breakdown of rocks through chemical reactions such as hydrolysis, oxidation, carbonation and dissolution. These reactions are greatly accelerated by the presence of abundant water (moisture) and warm temperatures, because water is the medium that carries and drives most of these reactions.
Step 1:
Examine each region. Glacier regions are cold and water is locked as ice, so mechanical (frost) action dominates. Arid regions lack moisture, so physical weathering by temperature changes dominates. Limestone regions do show chemical dissolution, but this depends on water availability rather than being a climatic region on its own.
Step 2:
A humid region has plentiful moisture and warmth all year, which provides exactly the conditions needed for vigorous chemical reactions. Hence chemical weathering clearly outpaces mechanical weathering there.
Answer: Option (4) — Humid region.
Chemical weathering involves the breakdown of rocks through chemical reactions such as hydrolysis, oxidation, carbonation and dissolution. These reactions are greatly accelerated by the presence of abundant water (moisture) and warm temperatures, because water is the medium that carries and drives most of these reactions.
Step 1:
Examine each region. Glacier regions are cold and water is locked as ice, so mechanical (frost) action dominates. Arid regions lack moisture, so physical weathering by temperature changes dominates. Limestone regions do show chemical dissolution, but this depends on water availability rather than being a climatic region on its own.
Step 2:
A humid region has plentiful moisture and warmth all year, which provides exactly the conditions needed for vigorous chemical reactions. Hence chemical weathering clearly outpaces mechanical weathering there.
Answer: Option (4) — Humid region.
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