Some thermometers contain alcohol. Alcohol is used in thermometers because expands and contracts easily. The correct option is C.
Thermometer is the temperature measuring device which consists of a liquid in the bulb which expands as the temperature is increased.
The liquid metal used in the thermometer must have the property to respond on the hotness and coldness rapidly.
In place of mercury, some thermometers use alcohol because an alcohol has a very low freezing point as compared to the Mercury.
Thus, the correct option is C.
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Some thermometers contain alcohol. Alcohol is used in thermometers because expands and contracts easily.
