Question

What is the function of the kink in a clinical the thermometer

Answer 1

It prevents the mercury to fall on its on.

Answer 2

$\sf \huge \underline{answer} \implies$

Kink in the Mercury thermometer helps to prevents the falling of mercury present in capillary tube into bulb. It ensures that the user takes the correct reading of temperature. That's the reason a person before taking a new reading must give a sudden shake to the clinical thermometer so that the mercury level comes to normal.