Question

A number of minerals like Ca, Mg and K are held over the surface of clay particles because the latter are

• A. Negatively charged
• B. Positively charged
• C. Neutral
• D. Having both positive and negative residual valencies

Answer 1

The correct option is A Negatively charged

Yes the elements like Ca, Mg, K are held over clay particles as these elements possess the positive charge, $C{a}^{+2}$ $,$Mg^{+2}$,$K^{+1}$ and clay particles bear negative charge, so due to the electrostatic attraction, these elements get attach to the clay particles.

Hence the right option is A.