Question

Givd reasons

thermometer these days use alcohol instead of Mercury


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Answer 1

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.

also

Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (-94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.

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Answer 2

$\huge\mathfrak\blue{Answer :-}$

Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (-94 °F). ... However, the measurement temperature range c. −200 °C to 78 °C, is highly dependent upon the type of alcohol used.