Question

A factor, which is important for the magnitude of specific surface of soil particles is__________

(a) Grain shape

(b) Grain size

(c) Both size and shape

(d) Grain molecular structure

The question was posed to me in an interview for internship.

I would like to ask this question from Soils Classification topic in chapter Classification of Soils of Geotechnical Engineering I

Answer 1

The correct answer is (a) Grain shape

Explanation: Specific surface varies for different shapes of particle having the same mass. Hence grain shape is important factor for determining specific surface.