Match the following lists :
| List-I (Material) | List-II (Specific yield %) |
|---|---|
| P.Clay | 1.5 – 15 |
| Q.Sand and gravel | 2.15 – 25 |
| R.Sandstone | 3.0·5 – 5 |
| S.Limestone | 4.1 – 10 |
Select the correct answer using the code given below :
- A2 3 1 4
- B1 2 4 3
- C3 1 2 4
- D4 2 1 3Correct
Solution
Concept
Specific yield of aquifer materials
Step-by-step solution
1. Clay retains most of its water: 1–10 → 4. 2. Sand and gravel give up water readily: 15–25 → 2. 3. Sandstone: 5–15 → 1. 4. Limestone: 0.5–5 → 3.
Explanation
Specific yield is the volume of water yielded by gravity per unit volume of saturated material, highest for coarse sand and gravel.
Why the other options are wrong
The other codes give clay or limestone a high yield.
Shortcut
Sand and gravel highest; limestone lowest.
Correct answer: D) 4 2 1 3