Study the given statements P and Q, based on the plasticity index of soils and select the most appropriate option with respect to the correctness of the statements.
P. The plasticity index of a soil is a measure of the amount of clay in the soil.
Q. When silt is added to clay, the plasticity index of the resulting soil increases.
Both P and Q
P only
Neither P nor Q
Q only
P only
Plasticity: The range of water content over which soils remains in a plastic state is known as the “Plasticity” of the soil. Clayey soils exhibit this plasticity property due to the presence of clay minerals.
Plasticity Index: It is a measure of the plasticity of the soil and is calculated as the difference between the liquid limit and the plastic limit.
Plasticity index order: clay> silt> sand > gravel, Adding silt to the clay reduces the plasticity or plasticity index of soil
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