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Kaolin minerals tend to appear in the region of
EXPLANATION
Soil Solid Phase
- Pedogenesis of Kaolinite:
- Kaolinite is a 1:1 non-expanding aluminosilicate clay mineral characterized by a low silica-to-alumina ratio ($SiO_2 : Al_2O_3 = 2 : 1$).
- Forms under advanced, intense weathering where high temperatures and heavy leaching remove basic cations and silica—conditions characteristic of warm, humid tropical and equatorial regions (Oxisols and Ultisols). (Correct answer: Option 1)
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