Question

The standard scale of temperature is:
(A) The mercury scales
(B) The gas scales
(C) The platinum resistance scale
(D) Liquid scale

Answer 1

Hint: We know that there are three temperature scales in use today, Fahrenheit, Celsius and Kelvin. The Fahrenheit temperature scale is a scale based on 32 for the freezing point of water and 212 for the boiling point of water, the interval between the two being divided into 180 parts. Based on this concept we have to solve this question.

Complete step by step answer:
The Ideal Gas Scale temperature has been defined as proportional to the product of PV for a fixed mass of gas. If the volume of the gas is kept constant, then the temperature is proportional to the pressure of the gas.
In case of Ideal Gas Scale, we can see that situation as:
When pressure approaches zero, all real gas will behave like ideal gas, that is PV of a mode of gas relying only on temperature. Therefore, we can design a scale with PV as its argument.
Of course, any bijective function will do, but for convenience’s sake linear function is the best.
Therefore, we define it as $T=\dfrac{1}{nR}{{\lim }_{P\to 0}}\left( PV \right)$
The ideal gas scale is still empirical since it puts gas at a special position and thus has limited applicability at some point no gas can exist.
So, we can say that the standard scale of temperature is the gas scales.

Hence, the correct answer is Option B.

Note: We know that ideal gas temperature scale can be developed by measuring the pressures of the gas in the vessel at two reproducible points, which include ice and steam points and the assigning suitable values to temperatures those two points. The triple point occurs at a fixed temperature and pressure for a specified substance.
We should know that Kelvin scales are used by the scientists to measure extremely hot and cold temperatures. There is no degree to express the temperatures in the Kelvin scale.