Multiple choice

Metals are good conductors of heat because

  1. they contain large no. of free electrons

  2. their atoms are relatively far apart

  3. their atoms collide frequently

  4. they have reflecting surface
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A Correct answer
Explanation

Metals are excellent conductors of heat because they possess a high concentration of delocalized 'free' electrons. These electrons can move rapidly through the metal lattice, transferring kinetic energy from hotter to colder regions.

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