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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 cod given below:

This questions was previously asked in

UPSC CSP GS Previous Year Paper 2024

1 only

1 and 2 only

2 and 3 only

1, 2 and 3

1, 2 and 3.

Hydrogels are three-dimensional networks composed of hydrophobic polymers synthesized by crosslinking water-soluble polymers.
Hydrogels can retain a large quantity of water within their network without disturbing their original structure.
This imparts flexibility and swelling properties to the hydrogel structures.