Question

The correct match between the physical states of the soils given in Group I and the governing conditions given in Group II is 

• A. 1-S, 2-P, 3-Q, 4-R
• B. 1-Q, 2-S, 3-P, 4-R
• C. 1-Q, 2-P, 3-R, 4-S
• D. 1-S, 2-Q, 3-P, 4-R

Hint:

For soils, understanding their consolidation, plasticity, and sensitivity helps in matching them with their corresponding physical conditions.

Answer 1

The Correct Option is A

Step 1: Understanding Group I.
- (1) Normally consolidated soil: This is soil that has not been subjected to any significant overburden pressure, meaning its over-consolidation ratio is 1. Hence, it matches with (S) over consolidation ratio = 1.
- (2) Quick clay: This is clay that has a high sensitivity (ratio of strength in undisturbed vs disturbed state), typically greater than 16. Hence, it matches with (P) sensitivity > 16.
- (3) Sand in critical state: In this state, the dilation angle of sand is zero, which indicates no volume change during shear. Hence, it matches with (Q) dilation angle = 0.
- (4) Clay of high plasticity: Clay with a high liquid limit (greater than 50) is classified as high plasticity. Hence, it matches with (R) liquid limit > 50.

Step 2: Conclusion.
Based on the analysis, the correct match is (A): 1-S, 2-P, 3-Q, 4-R.

Final Answer: \[ \boxed{1-S, 2-P, 3-Q, 4-R} \]