Question

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

• A. inorganic clay with medium plasticity
• B. inorganic silt with medium plasticity
• C. inorganic clay with high plasticity
• D. inorganic silt with high compressibility

Hint:

The plasticity chart helps classify soils based on their plasticity index and liquid limit. A higher plasticity index indicates higher plasticity in clays.

Answer 1

The Correct Option is C

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).