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The force which is responsible for withholding of soil particles, of lower content is __________

(a) Vander Waals force

(b) Electric force

(c) Frictional force

(d) Cationic linkage

I got this question in semester exam.

This intriguing question comes from Factors Affecting Compaction in chapter Compaction of Geotechnical Engineering I

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Right option is (b) Electric force

Explanation: When only a relatively small amount of water is present in the soil, it is firmly held by the electrical forces at the surface of soil particles with a high concentration of the electrolyte.

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