Question

# Name a liquid which is a good conductor of heat.A. MercuryB. BromineC. IodineD. Alcohol

Hint: A conductor can be termed as a good conductor based on the ease of flow of charge. Metals are excellent conductors. Any material having characteristics similar to that of metal will be a good charge carrier. Among the options filter the one with the characteristics of a good charge carrier for the correct answer.

Complete step by step solution:
The determination of good conduction of heat of a liquid depends upon its thermal conductivity. Thermal Conduction is the transport of energy due to the random motion of molecules across a temperature gradient. In Simple terms, thermal conductivity is the measure of a material’s ability to conduct heat. Thermal Conductivity is denoted by λ or k.
In the International System of Units, Thermal Conductivity is measured in watts per meter-Kelvin (W/(m.K)).
The thermal conductivity of the substances given above is as follows:-

 Substance Used Thermal Conductivity at 25°C in (W/(m.K)) Mercury 8.395 Bromine 0.120 Iodine 0.449 Ethyl Alcohol 0.167

Mercury is a heavy, silvery-white common metal which is also the only chemical element that stays liquid at room temperature and pressure. It is represented by the symbol Hg and the atomic number is 80.
Mercury has the highest Thermal Conductivity in comparison to Iodine, Bromine, and Alcohol.

Therefore, the correct option is A i.e., Mercury.