In which type of clay mineral is potassium fixation at its highest?

Show Answers

Clay minerals with a 1:1 layer structureClay minerals exhibiting a 1:2 layer configurationClay minerals characterized by a 2:1 layer arrangementClay minerals having a 2:2 layer patternNone of the above

Explanation

Potassium fixation is most pronounced in 2:1 type clay minerals due to their structural arrangement, which allows potassium ions to become trapped between layers. In contrast, 1:1 and 1:2 clays have different layer compositions that limit such fixation.