Which metal is used in the thermal process for welding railway tracks? MCQ with Answer and Explanation

Explanation:
The critical temperature (Tc) is the temperature above which a gas cannot be liquefied, regardless of how much pressure is applied. Above Tc, the kinetic energy of the molecules is too high for intermolecular forces to hold them together in a liquid state, even under extreme pressure.

Explanation:
Enzymes are complex organic molecules that act as biological catalysts in living organisms. Chemically, most enzymes are globular proteins. They are highly specific to their substrates and work optimally at body temperature and near-neutral pH, unlike many industrial catalysts that require extreme conditions.

Explanation:
Vulcanization cross-links rubber polymer chains with sulfur bridges, improving elasticity, strength, and durability. Invented by Charles Goodyear. It converts raw rubber into useful form.