A. Both hardness and Alkalinity are measured in units of mg/L as $\text{CaCO}_3$
B. Enrichment of C and S are responsible for eutrophication of lakes
C. Alkalinity is a base neutralizing capacity
D. Dissolved ions increases salinity of water
E. Turbidity is a measure of transparency of water
Choose the most appropriate answer from the options given below :
Correct. Hardness and alkalinity are typically quantified using the same unit, milligrams per liter (mg/L), expressed equivalent to calcium carbonate ($\text{CaCO}_3$). This standard unit allows for direct comparison and reporting across different water samples.
Incorrect. Eutrophication is primarily caused by the excessive enrichment of water bodies with nutrients, particularly phosphorus (P) and nitrogen (N), which stimulates excessive plant and algae growth.
Incorrect. While alkalinity is related to the capacity to neutralize acids, the statement does not fully capture its scope in the context required for this question's correct answer set.
Correct. Salinity fundamentally measures the total amount of dissolved salts in water. Therefore, an increase in the concentration of dissolved ions directly leads to an increase in the water's salinity.
Correct. Turbidity serves as an indicator of water clarity. It quantifies the degree to which water has lost its transparency due to the presence of suspended particles, essentially measuring how cloudy the water is.
The statements identified as correct are A, D, and E.
This combination aligns with the provided correct answer, Option 3.
| 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 |