Question

The crystalline minerals whose surface activity is such that, they develop cohesion and plasticity are called __________

(a) Non-clay minerals

(b) Clay minerals

(c) Bulky particles

(d) Primary minerals

I had been asked this question during an interview.

My doubt stems from Solid Particles in Soil topic in section Soil Structure and Clay Minerology of Geotechnical Engineering I

Answer 1

Correct choice is (b) Clay minerals

To elaborate: As the surface activity of clay minerals is high they develop a property of cohesion and plasticity.