Question

Which of the following is not true about Laboratory thermometers ?

• A. Laboratory thermometers are used to measure temperatures with a high degree of precision.
• B. Laboratory thermometers are used to measure body temperature.
• C. Range of laboratory thermometer is -10C to 110C
• D. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point etc.

Answer 1

Answer: (B)

Laboratory thermometers are used to measure body temperature.

A laboratory thermometer is a tool used in laboratories to measure temperature with high accuracy. It can be partially or fully immersed in the substance being measured. A laboratory thermometer is recognizable by its long stem with a silver bulb at the end. The silver color in the bulb normally indicates the presence of mercury. Mercury expands as the temperature increases, thus raising the reading, while decreasing temperatures contract the mercury, lowering the reading. Mercury-in-glass thermometers are less used in the 21st century as preference is shifted to other types of thermometers, such as digital, alcohol-filled and organic-based thermometers.

hence,Laboratory thermometers are $not$ used to measure body temperature.