Q83
The maximum fixation of K occurs
A.
In 1 : 1 type clay minerals
B.
In 1 : 2 type clay minerals
C.
In 2 : 2 type clay minerals
D.
In 2 : 1 type clay minerals
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
The maximum fixation of K occurs in 2 : 1 type clay minerals.The major minerals responsible for K fixation are illite, vermiculite and smectite. It has been demonstrated that vermiculite and smectite minerals have more ability to fix K compared to other 2 : 1 minerals due to the higher specific surface area and negative layered charge.