Chemical weathering of rocks is much greater in a place with

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cold and dry climate

hot and humid climate

hot and dry climate

cold and humid climate

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Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2018

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The correct answer is (B) hot and humid climate. Chemical weathering involves chemical reactions like hydrolysis, oxidation, carbonation, etc., which break down rocks. These reactions are significantly accelerated by higher temperatures and the presence of water. A hot climate increases the rate of chemical reactions, and a humid climate provides the necessary moisture (water) for these reactions to occur.

Chemical weathering is most effective in environments with high temperatures and abundant moisture, as these conditions promote the chemical breakdown of minerals in rocks.

In cold climates, physical weathering (like freeze-thaw) is more dominant. In dry climates, both chemical and physical weathering rates are generally lower due to lack of water, although some forms of weathering like exfoliation (due to thermal expansion/contraction) can occur. Hot and dry climates might see relatively faster chemical weathering than cold climates if some moisture is available, but hot and *humid* is the most conducive environment for chemical weathering.

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