Question

Which of the following statement(s) is/are true for absolute zero temperature?

• A. It can be achieved practically
• B. It cannot be achieved practically
• C. No temperature below this is possible.
• D. none of the above

Answer 1

Answer: (B), (C)

The correct options are
B It cannot be achieved practically
C No temperature below this is possible.

Zero kelvin (−273.15 °C) is defined as absolute zero.

Absolute zero is the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as 0. Absolute zero is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion. The theoretical temperature is determined by extrapolating the ideal gas law; by international agreement, absolute zero is taken as −273.15° on the Celsius scale (International System of Units), which equals −459.67° on the Fahrenheit scale (United States customary units or Imperial units).The corresponding Kelvin and Rankine temperature scales set their zero points at absolute zero by definition.

Hence option B,C are correct.