Why are cooking utensils often made with a copper bottom?

Question

Why are cooking utensils often made with a copper bottom?

1. A. Copper is a good insulator, preventing heat loss.
2. B. Copper has a low melting point, making it easy to manufacture.
3. C. Copper is a good conductor of heat, ensuring even heating. (Correct answer)
4. D. Copper reacts readily with food, enhancing flavor.

Correct Answer

Option C — Copper is a good conductor of heat, ensuring even heating.

Detailed Solution & Explanation

The correct answer is Copper is a good conductor of heat, ensuring even heating.

Key Points

• Copper has very high thermal conductivity, second only to silver among common metals.
• A copper base spreads heat rapidly and evenly across the bottom of the vessel, preventing hot spots that would scorch food in one place while leaving it underdone elsewhere.
• The other options are wrong on physics: copper is a conductor, not an insulator; its melting point (1085 °C) is high, not low; and it is chosen partly because it does not react readily with food in normal use.

Additional Information

• Thermal conductivity order among familiar metals: silver > copper > gold > aluminium > iron.
• Copper is also an excellent electrical conductor, which is why it dominates household wiring; the two conductivities go together because both depend on free electrons.
• Cooking vessels are often clad — a copper or aluminium core between stainless-steel layers — combining the core's conductivity with steel's durability and non-reactivity.
• The handles are made of poor conductors such as plastic or wood for exactly the opposite reason.

प्रश्न (हिन्दी में)

खाना पकाने के बर्तन प्रायः तांबे के तले वाले क्यों बनाए जाते हैं?

1. A. तांबा एक अच्छा इंसुलेटर है, जो ऊष्मा की हानि को रोकता है।
2. B. तांबे का गलनांक कम होता है, जिससे इसका निर्माण आसान होता है।
3. C. तांबा ऊष्मा का अच्छा संवाहक है, जो समान तापन सुनिश्चित करता है।
4. D. तांबा भोजन के साथ आसानी से प्रतिक्रिया करता है, जिससे उसका स्वाद बढ़ जाता है।