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Which of the following components of soil are acts as chemical sponges in the soil?(a) Clay minerals(b) Silica(c) Sodium(d) PotassiumThis question was posed to me in an online quiz.This intriguing question originated from Fire Clays, Illite and Kaolinite topic in portion Molding and Core Sands of Casting-Forming-Welding I

Answer»

Correct answer is (a) Clay minerals

The best I can explain: Clay minerals are quite STABLE and are an important part of the SOIL. Clay minerals are ALSO called as chemical sponges which basically HOLD water content and dissolved nutrients from other mineral particles. This results due to the presence of unstable electric charges on the surface of clay particles, in which opposite charges attract to each other.



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