Question

You are planning to go to a very cold place where the night temperature drops to-50℃.Which thermometer will you take with you-mercury or alcohol?Why?​

Answer 1

Ethanol-filled thermometers can measurements of minimum−70 degree Celsius ......

Mercury filled thermometer can measure minimum temperature of -36 degree Celsius.....

so alcohol filled thermometer is best

Answer 2

You should take the alcohol filled thermometer as alcohol freezes at -70 degree Celsius and mercury freezes at -38 degree Celsius and the temperature of the place drops at 50 degree Celsius. Thus taking the alcohol filled thermometer will be more preferable and useful.