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Alloys (bell metal): Bell metal is an alloy of which two metals? Identify the traditional composition used for bells with sonorous tone. Choose the correct alloy pair.

Difficulty: Easy

Nickel and copper
Zinc and copper
Brass and nickel
Tin and copper

Correct Answer: Tin and copper

Explanation:

Given data

Object: Bells and gongs.

Concept/Approach
Bell metal is a high-tin bronze, typically ~20–25% Sn and the balance Cu, giving hardness and resonance.

Common pitfalls
Confusing with brass (Cu–Zn) or cupronickel (Cu–Ni).

Final Answer
Tin and copper

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