$A$ thermoelectric thermometer is based on:

At what temperature is the density of water maximum? Provide the value in $^\circ C$, $^\circ F$, and $K$.

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

An ideal thermometer should have

In the absence of an atmosphere,the average temperature on the surface of the Earth would be . . . . . . .

$Assertion :$ In a pressure cooker,water is brought to a boil. The cooker is then removed from the stove. Now,upon removing the lid of the pressure cooker,the water starts boiling again.
$Reason :$ The impurities in water bring down its boiling point.