Question

Thermal conductivity is maximum for which substance

• A. Ice
• B. Silver
• C. Wood
• D. None of these

Answer 1

The correct option is B

Silver

Explanation for correct option:

In the case of option (B),

1. Metals have an abundance of free electrons which facilitate the conduction of heat, making them good conductors.
2. Therefore, they have high values of thermal conductivity.
3. Silver is a metal and has high thermal conductivity.

Explanation for incorrect options:

In the case of option (A),

Ice is non-metal and has a relatively less number of free electrons/ions that promote heat conduction.

In the case of option (C),

1. Wood is a non-metal and it has relatively lesser electrons that facilitate heat conduction.
2. Wood has pores filled with air molecules and these air molecules are poor conductors of heat.

Hence, option (B) is the correct answer.