Consider the following statements regarding quality difference of ground water and surface water : 1. The Turbidity of ground water is high, whereas surface water is little. 2. Total dissolved solids of ground water is lower than surface water. 3. Concentration of inorganic compounds or ions of ground water is higher than surface water. Which of the above statements is/are correct ?
- A1 and 2
- B2 only
- C3 onlyCorrect
- D1 and 3
Solution
Concept
Quality of groundwater versus surface water
Step-by-step solution
1. Groundwater is naturally filtered, so its turbidity is low (statement 1 false). 2. Its dissolved solids are higher because it dissolves minerals (statement 2 false). 3. Concentration of inorganic ions (hardness, iron) is higher in groundwater (statement 3 true).
Explanation
Surface water is turbid and may be polluted, while groundwater is clear but mineral-rich.
Why the other options are wrong
Statements 1 and 2 reverse the facts.
Shortcut
Groundwater: clear but hard, high TDS.
Common mistake
Assuming groundwater is more turbid.
Correct answer: C) 3 only