Question

Mercury is used in thermometers because:

• A. It is a liquid metal.
• B. It expands or contracts with temperature.
• C. It is a non-metallic liquid.
• D. Mercury does not stick to glass walls.

Answer 1

Answer: (A), (B), (D)

The correct options are
A It is a liquid metal.
B It expands or contracts with temperature.
D Mercury does not stick to glass walls.

Mercury is a metal and a good conductor of heat. It has high boiling point which helps it to remain in liquid state at the room temperature. As the temperature of mercury increase, it expands and the length of mercury column increases. Also, it is shiny (so easily visible) and does not stick to the walls of thermometer.