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Geography

Weathering: physical, chemical, and biological

In Class 11 Geography, this topic from the chapter “Geomorphic Processes” explains weathering as the breakdown and alteration of rocks at or near Earth’s surface without transporting the material. Students learn how physical weathering acts through temperature changes, pressure release, and frost; how chemical weathering involves processes such as solution, carbonation, oxidation, hydration, and hydrolysis; and how plants, animals, and microorganisms drive biological weathering. The topic also connects climate, rock type, relief, and time with soil formation and landscape development.

Hard · Level 1 · 25 questions

Practice questions

01Under which condition is frost action most effective as mechanical weathering?

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02Why does carbonation weather limestone more rapidly?

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03Why is chemical weathering more intense in hot humid regions than in dry regions?

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04Granular disintegration is most clearly seen in which type of rocks?

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05Which statement best describes the role of plant roots in biological weathering?

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06Salt crystallization weathering is especially effective in which region?

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07What is the main effect of hydration weathering on minerals?

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08Which mineral group is most easily affected by oxidation?

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09Exfoliation due to unloading pressure is related to which process?

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10What is the most accurate role of water in hydrolysis?

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11Which option correctly distinguishes weathering from erosion?

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12Spheroidal weathering is most associated with which cause?

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13How can physical weathering promote chemical weathering?

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14Which statement best fits solution weathering?

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15Why does differential weathering occur in a rock made of hard and soft minerals?

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16Under which condition will biological and chemical weathering act together strongly?

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17What effect does daily temperature range have on rocks in desert regions?

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18Which rock structure most facilitates weathering?

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19If feldspar in granite changes into clay minerals, which process is indicated?

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20In which condition is chemical weathering most likely to be slow?

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21Development of reddish brown colour in iron bearing minerals is evidence of which weathering process?

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22Which statement correctly explains the formation of regolith?

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23The effect of organic acids on rocks is best placed in which category?

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24Which process is mainly responsible for cave formation in limestone regions?

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25Which option gives an example of physical weathering without chemical alteration?

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