Which among the following is super cooled liquid?

The correct answer is Option (4) → Glass

Glass is often referred to as a supercooled liquid because it possesses a unique atomic structure that sits somewhere between a solid and a liquid. Reasons:

 

• Lack of Crystalline Structure: Unlike Diamond, Graphite, or Copper—which have atoms arranged in a strict, repeating geometric pattern—glass has a disordered internal structure.

  The Cooling Process: When glass is made, it is cooled from a molten state so rapidly that the atoms don't have enough time to organize into a crystal lattice. They essentially get "frozen" in a chaotic, liquid-like arrangement.

  Viscosity: It is "supercooled" because it has the high viscosity (thickness) of a solid but the molecular randomness of a liquid.