GENERAL KNOWLEDGE

Detailed explanation-1: -The mercury thermometer was invented by Dutch physicist Daniel Gabriel Fahrenheit in 1714. It consists of a narrow glass tube with a bulb at the bottom, containing mercury. The volume of mercury changes with temperature; mercury is driven out of the bulb and up the tube as the temperature rises.

Detailed explanation-2: -Mercury thermometers cover a wide temperature range from −37 to 356 °C (−35 to 673 °F); the instrument’s upper temperature range may be extended through the introduction of an inert gas such as nitrogen.

Detailed explanation-3: -They are common in many households, schools, and medical facilities. There are two general types of mercury thermometers that measure body temperature: Oral/rectal/baby thermometers, containing about 0.61 grams of mercury.

Detailed explanation-4: -Mercury and petrolate usually can measure temperature in a range of −40 to +900°C and −200 to +260°C, respectively [2].