Question

WHY DOCTORS DIP THE THERMOMETER IN A LIQUID BEFORE USE? WHY IS IT KEPT UNDER THE TONGUE

Answer 1

Doctors dip thermometers in a liquid before using it to disinfect it from the  germs. There are some receptors under the tongue which sensor heat in the body.So we put a thermometer under the tongue.

Answer 2

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The liquid is an alcohol based disinfectant. This liquid cleans the thermometer.

The thermometer is kept under the tongue, because, it gives the correct reading of inner body temperature.