The temperature at which the reading on the Fahrenheit scale becomes $90 \%$ more than the reading on the Celsius scale is: (in $^{\circ} F$)

Mercury is often used in clinical thermometers. Which one of the following properties of mercury is not a reason for this?

If the reading in Fahrenheit scale is twice the reading in Celsius scale,then the reading in Fahrenheit scale is (in $^{\circ} F$)

Is the bulb of a thermometer made of a diathermic or adiabatic wall?

Temperature of water at the surface of a lake is $ -20^{\circ}C$. Then,the temperature of water just below the lower surface of the ice layer is ...... $^{\circ}C$.

$A$ faulty thermometer has its fixed points marked $5^{\circ}$ and $95^{\circ}$. This thermometer reads the temperature of a body as $59^{\circ}$. Then the correct temperature of the body on the Celsius scale is ........ $^{\circ}$.