Question

The terms used for production and measurement of very low temperature (below b.pt. of $N_2$ i.e., 77 K) and very high temperature (< 1000 K) are respectively called:

• A. cryogenics, pyrometry
• B. pyrometry, cryogenics
• C. thermometry, pyrometry
• D. coulometry, pyrometry

Answer 1

The correct option is A cryogenics, pyrometry

Cryogenics is the study of the production and behaviour of materials at very low temperatures.
Pyrometry: the measurement of temperatures greater than 1500 degrees Celsius.
Coulometry is techniques in analytical chemistry that determine the amount of matter transformed during an electrolysis reaction by measuring the amount of electricity.