UPSC CSE Prelims
Question 86
In which of the following are hydrogels used ?
- Controlled drug delivery in patients
- Mobile air-conditioning systems
- Preparation of industrial lubricants
Select the correct answer using the code given below :
View correct answer and explanation
Correct answer: A
Correct Option: A (1 only)
Explanation: Hydrogels are water-swollen polymer networks useful for controlled drug release; the other listed applications do not represent the standard uses intended by this question.
Statement / Pair / Item-wise Analysis:
1. Correct/True - Hydrogels can regulate delivery of drugs through swelling/diffusion.
2. Incorrect/False - Ordinary mobile air-conditioning relies on refrigerant systems, not hydrogels as the primary technology here.
3. Incorrect/False - Industrial lubricants typically use oils/greases rather than hydrogel dosage matrices.
Option-wise Analysis:
A. Correct-includes precisely the true/correct statements or pairs identified above.
B. Incorrect-incorrectly includes 2 (Ordinary mobile air-conditioning relies on refrigerant systems, not hydrogels as the primary technology here.).
C. Incorrect-incorrectly includes 2 (Ordinary mobile air-conditioning relies on refrigerant systems, not hydrogels as the primary technology here.); incorrectly includes 3 (Industrial lubricants typically use oils/greases rather than hydrogel dosage matrices.); omits correct item 1 (Hydrogels can regulate delivery of drugs through swelling/diffusion.).
D. Incorrect-incorrectly includes 2 (Ordinary mobile air-conditioning relies on refrigerant systems, not hydrogels as the primary technology here.); incorrectly includes 3 (Industrial lubricants typically use oils/greases rather than hydrogel dosage matrices.).
Review note: Research explores hydrogel-based cooling and lubrication, but the supplied exam key asks established applications and counts only drug delivery.