Q. In which of the following are hydrogels used?
1. Controlled drug delivery in patients
2. Mobile air-conditioning systems
3. Preparation of industrial lubricants
Select the correct answer using the code given below:
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
Correct answer: (d) 1, 2 and 3
Question from UPSC Prelims 2024 GS Paper
Explanation:
1. Controlled drug delivery in patients:
As mentioned before, this is a well-known application of hydrogels. Their ability to absorb water and release substances in a controlled manner makes them ideal for drug delivery systems.
2. Mobile air-conditioning systems:
Hydrogels are indeed used in some mobile air-conditioning systems, particularly in evaporative cooling applications. They can help in moisture retention and gradual water release, which can enhance cooling efficiency.
3. Preparation of industrial lubricants:
Hydrogels are used in some specialized industrial lubricants, especially where water-based lubrication is preferred. They can provide unique properties like water retention and controlled release of lubricating agents.