Question

Which of the following option is correct for thermal conductivity of material $\left(k\right)$?

• A. $k_{gases}<k_{liquids}<k_{solids}$
• B. $k_{gases}>k_{liquids}>k_{solids}$
• C. $k_{liquids}>k_{gases}>k_{solids}$
• D. $k_{liquids}<k_{gases}<k_{solids}$

Answer 1

The correct option is A $k_{gases}<k_{liquids}<k_{solids}$

In conduction heat energy is transmitted through collisions between neighbouring atoms or molecules.

From the figure we can say,
Conduction will be more significant in solids, and less through in liquids and gases due to the lesser space between molecules which transfer heat energy.