1.

Why has mecury been replaced by alcohol in a thermometer?

Answer»

Because mercury is harmful for us, it has been replaced by alcohol in a thermometer. 

[Notes: (i) Mercury thermometers are still widely used in laboratories in schools and colleges. (ii) A thermometer is a device to measure temperature. A thermometer containing mercury in its bulb is called a mercury thermometer. There are other types of thermometer such as a thermocouple thermometer, a platinum resistance thermometer, a thermistor thermometer, etc.]



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