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The poorest conductor of heat is...

The poorest conductor of heat is

A

aluminium

B

silver

C

gold

D

lead.

Text Solution

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The correct Answer is:
To determine the poorest conductor of heat among the given options, we can analyze each option based on their properties as conductors. ### Step-by-Step Solution: 1. **Identify the Options**: The options provided are: - A. Aluminium - B. Silver - C. Coal - D. Lead 2. **Evaluate the Conductivity of Metals**: - **Aluminium**: Known for being a good conductor of heat. It is widely used in cooking utensils and heat exchangers. - **Silver**: The best conductor of heat among all metals. It is often used in electrical connections and high-quality cookware. - **Lead**: While it is a metal, it is not as good a conductor as Aluminium or Silver. Lead has a lower thermal conductivity compared to these metals. 3. **Consider Non-Metal Conductivity**: - **Coal**: This is a non-metal and is generally a poor conductor of heat. Non-metals typically do not conduct heat well. 4. **Analyze Lead's Reactivity**: - Lead reacts with the atmosphere to form lead oxide. Metal oxides are generally poorer conductors of heat compared to their parent metals. Therefore, the formation of lead oxide further decreases lead's ability to conduct heat. 5. **Conclusion**: Based on the analysis, lead is the poorest conductor of heat among the options provided. ### Final Answer: The poorest conductor of heat is **D. Lead**. ---
To determine the poorest conductor of heat among the given options, we can analyze each option based on their properties as conductors. ### Step-by-Step Solution: 1. **Identify the Options**: The options provided are: - A. Aluminium - B. Silver - C. Coal ...
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