For a soil sample, the liquid limit is 32% and the plastic limit is 20%. What is the plasticity index (PI) g

Answer : The plasticity index (PI) is 12 %.

Explanation :

Plasticity index (PI) : It is a measure of the plasticity of a soil.

The plasticity index is the difference between the liquid limit and the plastic limit.

Formula used:

PI = LL - PL

where,

PI = Plasticity index

LL = Liquid limit

PL = Plastic limit

As we are given that:

Liquid limit = 32 %

Plastic limit = 20 %

Now putting all the given values in the above formula, we get:

PI = LL - PL

PI = 32 % - 20 %

PI = 12 %

Therefore, the plasticity index (PI) is 12 %.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

i'm pretty sure it is letter c.) car