Question

Consider the following clay minerals:

1. Kaolinite
2. Montmorillonite
3. Illite

What is the correct sequence in an increasing order of their plasticity index?

• A. 1 - 2 - 3
• B. 3 - 2 - 1
• C. 1 - 3 - 2
• D. 3 - 1 - 2

Answer 1

The correct option is C 1 - 3 - 2

(c)
The values of plasticity index of kaolinite, Illite and montmorillonite are 15, 30 and 300 respectively.