A. Iron
B. Silicon
C. Oxygen
D. Magnesium
E. Nickel
Choose the correct answer from the options given below :
The question requires arranging specific elements based on their mass percentage contribution to the Earth's bulk composition in increasing order.
The approximate mass percentages for the given elements in the Earth's bulk are:
Arranging these elements from the lowest mass percentage to the highest yields the following order:
Therefore, the correct sequence is E, D, B, C, A.
| 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 |