The Swelling/shrinking Tendency of Some Silicate Clay Minerals Is Due

question 12

Multiple Choice

The swelling/shrinking tendency of some silicate clay minerals is due primarily to _____.

• A)the presence of cations attracted by the negative charges on the internal surfaces
• B)the movement of water molecules in and out of the interlayers of the crystal
• C)varying thickness of the film of water covering the external surface of the particles
• D)expansion in the width of the interlayers due to movement of larger ions such as K⁺
• E)the high Mg²⁺ contents in the octahedral layers

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