Which of the following groups is a good conductor of heat?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Steel, copper and aluminum.
- Steel, copper, and aluminum are all metals, and metals are generally good conductors of heat.
- Copper and aluminum, in particular, are known for their excellent thermal conductivity, making them ideal materials for use in cooking vessels and heat exchangers.
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Steel also conducts heat, although not as efficiently as copper or aluminum; however, it still performs significantly better than most non-metallic materials.
Other Options:
- Sand, wood and silver: Silver is an excellent conductor, but sand and wood are insulators.
- Iron, wood and copper: Wood is a poor conductor.
- Mercury, wood and sand: Mercury is a metal and conducts heat, but wood and sand do not.