Q. Who proposed the concept of absolute zero temperature?
Answer: Lord Kelvin
Notes: In 1848, Lord Kelvin defined absolute zero as the lowest possible temperature where molecular motion theoretically stops. The Kelvin temperature scale, named after him, begins at absolute zero. Absolute zero is 0 K, equivalent to -273.15°C. Kelvin’s formulation laid the foundation for thermodynamics and temperature measurement in physics and chemistry.