Thank you for reporting, we will resolve it shortly
Q.
The least porous soil among the following is a
Delhi UMET/DPMTDelhi UMET/DPMT 2009Organisms and Populations
Solution:
Clayey soils consist of hydrated silicates of aluminium and the size of the soil particles is less than $0.002\, mm$. Clayey soils are the least porous, compact soils with good hydration but little aeration.