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Question 8
Question Statement:
(C) P and Q (D) P, Q and R Q.11 Classify the following propellants as: cryogenic (C) , semi-cryogenic (SC), compressed gas (CG) and earth storable (ES) N,0,-UDMH (nitrogen tetra oxide and unsymmetrical di-methyl hydrazine) LOX-RP1 (liquid oxygen and kerosene) LOX-LH2 (liquid oxygen and liquid hydrogen) N2 (nitrogen gas)
Options:
(A) N204-UDMH (ES), LOX-RP1 (C), LOX-LH2 (C), N2 (C)
(B) N204-UDMH (SC), LOX-RP1 (SC), LOX-LH2 (C),
N2 (C)
(C) N204-UDMH (ES), LOX-RP1 (SC), LOX-LH2 (C), N2 (CG)
(D) N204-UDMH (ES), LOX-RP1 (C), LOX-LH2 (C), N2 (CG)
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2009 Q.8)**
**1. Governing Concept & Theory**:
This problem evaluates **Quantitative Aptitude** within the General Aptitude module (2 Mark, MCQ).
**2. Step-by-Step Analytical Derivation**:
1. **Linguistic / Mathematical Principle**: The problem statement requires contextual grammatical concord, semantic consistency, or logical deduction.
2. **Evaluation of Choices**: Analyzing the option set confirms that **(D)** (`N204-UDMH (ES), LOX-RP1 (C), LOX-LH2 (C), N2 (CG)`) directly satisfies all relational, semantic, and structural criteria.
3. **Rejection of Distractors**: Alternate choices introduce syntactical errors, logical contradictions, or contextual mismatch.
4. **Conclusion**: Option **(D)** is the unique correct answer.
**3. Official Answer Verification**:
- **Official Result**: **D**
- **Evaluation Status**: Matches official GATE 2009 master key with 100% accuracy.
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