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Why does ice covered in sawdust not melt quickly ?
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- Sawdust does not allow the air to touch the ice
- The water is absorbed by sawdust
- Sawdust is a bad conductor of heat
- Sawdust is good conductor of heat
- Sawdust does not allow the air to touch the ice
Correct Option: C
Ice needs to absorb heat energy to melt and become water (called latent heat of fusion). Since sawdust is a poor conductor of heat, it takes more time for the ice to absorb the required heat energy. This allows ice to remain in solid state for more time when packed in saw dust.
