The best conductor of heat among the following is

Correct option is B

Correct Answer:B. Mercury

• Mercury, a metallic liquid, is the best conductor of heat among the given options.

• It conducts heat much better than alcohol, ether, or water, all of which are non-metallic liquids.

• Being a metal, mercury has free electrons that help transfer heat quickly.

• Used in thermometers due to its:

  • High thermal conductivity

  • Uniform expansion

  • Visibility (shiny and opaque)

• Other substances:

  • Water: Good coolant, but poorer conductor than metals.

  • Alcohol: Used in spirit thermometers for very low temperatures, but poor heat conductor.

  • Ether: Volatile and highly flammable; not used for heat conduction.

• Best conductor overall: Silver, followed by copper and aluminum.