which thermometer is preferred for a mountaineer between mercury and alcohol thermometer why?
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Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Pure ethanol freezes at -115 degrees C, while mercury freezes at -38 degrees C. Thermometers rely upon thermal expansion of the liquid in a bulb at the base of a thin glass tube.
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Answer:
alcohol thermometer as it can measure much lower temperature up to -115°c
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