The negative charge on 2 : 1 clays is

A. pH dependent

B. pH independent

C. Both A and B

D. None of these

Answer: Option C

Solution(By Examveda Team)

The negative charge on 2 : 1 Clays is both pH-dependent and pH-independent.
A 2 : 1 clay consists of an octahedral sheet sandwiched between two tetrahedral sheets and 2 : 1 layers have a net negative charge and may be bonded together either by individual cations or by positively charged octahedral sheets.
Some examples are talc, vermiculite and montmorillonite.