A. Sand
B. Clay
C. Gravel
D. Sandstone (Semi consolidated)
Choose the correct answer from the options given below :
Porosity measures the void space within a material. It's calculated as the ratio of the pore volume to the total volume, expressed as a percentage. $Porosity = (\text{Volume of Pores} / \text{Total Volume}) \times 100\%$
We evaluate the typical porosity for each material:
The ranking from highest porosity to lowest is based on particle size, packing density, and consolidation effects:
The correct sequence in decreasing order of porosity is B, A, C, D.
| List - I (Decomposition Processes) | List - II (Function) |
|---|---|
| A. Leaching | I. Degradation of humus by microbes to release inorganic nutrients |
| B. Catabolism | II. Accumulation of a colloidal dark coloured amorphous substance, which is a reservoir of nutrients |
| C. Humification | III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances |
| D. Mineralization | IV. Water soluble inorganic nutrients go down into the soil and get precipitated |
Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:
Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?