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Question

Consider the following statements:
1. Organic matter decreases the permeability of a soil.
2. Entrapped air decreases the permeability of a soil.
Which of these statements are correct?

A
1 only
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B
2 only
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C
Both 1 and 2
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D
Neither 1 nor 2
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Solution

The correct option is C Both 1 and 2
(c)
The permeability is greatly reduced if air is entrapped in the voids thus reducing its degree of saturation. Organic foreign matter also has the tendency to move towards critical flow channels and choke them up, thus decreasing the permeability.

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