silver grey liquid used in clinical thermometer
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because it has proper melting point and it not sticks at the sides of the thermometer glass and it shines which makes it easy to see.
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mercury
If the liquid in your thermometer bulb is silver, then the liquid might be: mercury, or. a non-toxic compound that looks similar to mercury.
Mercury is preferred in thermometers because it is present in liquid state over a wide range of temperatures.
It is a silvery grey in colour, therefore it is relatively easy to observe.
The clinical thermometer is marked to indicate a small change of 0.2 degree Celsius.
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