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?

Bulb

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Sealed end

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Kink

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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.

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Similar questions

When we take out a laboratory thermometer from boiling water, the mercury level does not fall even after few minutes.

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