Which of the following components of a mercury thermometer is responsible for keeping the level of mercury from falling even after we take it out of our mouth?
A
Bulb
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B
Sealed end
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C
Kink
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D
Capillary tube
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Solution
The correct option is C Kink The kink is used only in a clinical thermometer to restrict the backward flow of mercury so that readings can be taken easily. It is absent in a lab thermometer.