Question

Arrange the following in decreasing order of Basal Spacing:
(A) Kaolinite
(B) Montmorillonite
(C) Illite
(D) Vermiculite
Choose the correct answer from the options given below:

• A. (A), (B), (D), (C)
• B. (A), (B), (C), (D)
• C. (B), (A), (D), (C)
• D. (B), (D), (C), (A)

Hint:

Basal spacing order: Montmorillonite > Vermiculite > Illite > Kaolinite.

Answer 1

The Correct Option is D

Montmorillonite has the largest basal spacing due to swelling properties, followed by Vermiculite, then Illite (moderate), and Kaolinite (lowest, non-expanding).