Final answer:
Mercury is used as a thermometric liquid due to its wide temperature range, high boiling and low freezing points, and consistent expansion and contraction with temperature changes.
Step-by-step explanation:
The reason for using mercury as a thermometric liquid is because it possesses certain properties that make it ideal for this purpose. First, mercury has a wide range of temperature measurement, it remains in a liquid state over a large temperature range, allowing for accurate readings. Second, mercury has a high boiling point and low freezing point, making it suitable for measuring extreme temperatures. Lastly, mercury has a high coefficient of expansion, meaning it expands and contracts consistently with changes in temperature, making it a reliable and consistent liquid for thermometers.
Learn more about Mercury as a thermometric liquid.