Which among the following is super cooled liquid ?

The correct answer is Option (4) → Glass

Solids are of two kinds. Crystalline solids have a regular, long range arrangement of particles and a sharp melting point. Amorphous solids have only short range order, soften over a range of temperature and are isotropic. Because their particles are arranged like those of a liquid, amorphous solids flow very slowly and are called pseudo solids or super cooled liquids.

Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.

NCERT (Pre-rationalised edition, 2022-23):
Amorphous and Crystalline Solids – …