Maximum density of $H_2O$ is at the temperature .......... $^\circ F$.

The graph $AB$ shown in the figure is a plot of the temperature of a body in degree Celsius $(C)$ versus degree Fahrenheit $(F)$. Then:

The phenomenon of superconductivity is observed at a temperature of $95 \ K$. The corresponding temperature on the Fahrenheit scale is ...... $^\circ F$.

On a new temperature scale,the melting point of ice is $20^{\circ} X$ and the boiling point of water is $110^{\circ} X$. $A$ temperature of $40^{\circ} C$ would be indicated on this new temperature scale as (in $^{\circ} X$)

The temperature at which the reading of a Fahrenheit thermometer will be double that of a centigrade thermometer is ........ $^\circ$.

Standardisation of thermometers is obtained with