The standard plasticity chart for the classification of a fine-grained soil is shown in the figure. As per the Indian standard soil classification system, X represents
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- inorganic clay with medium plasticity
- inorganic silt with medium plasticity
- inorganic clay with high plasticity
- inorganic silt with high compressibility
The Correct Option is C
Solution and Explanation
The standard plasticity chart for the classification of fine-grained soils is used to classify soils based on their liquid limit and plasticity index. The position of the point \( X \) in the diagram helps in determining the soil type.
- From the figure, \( X \) lies in the region that corresponds to inorganic clay with high plasticity.
- The plasticity index value of \( X \) is greater than 35, which is characteristic of high plasticity clay.
So, soil \( X \) can be classified as inorganic clay with high plasticity based on the IS classification system.
Thus, the correct answer is option (C).
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