Which metal is common in the composition of alloys gunmetal, bronze and duralumin ?

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Copper

Tin

Aluminium

Zinc

answer is A.

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Detailed Solution

Concept- Alloys are the mixture of one or more elements or metals together to form a more ductile, malleable and high tensile metal.
Alloys are a type of solid solution made by mixing two metals. Alloys are a homogeneous mixture and the particles are not visible to the naked eye and also do not scatter the light falling on them.
Now, the composition of given alloys is-

Sr. No	Name of the Alloy	Composition and its percentage (approx.)	Uses
1	Gun Metal	Copper 88%, Tin 10%, Zinc 2%	For making canons, guns, matching parts
2	Bronze	Copper 90%, Tin 10%	Statues, coins, ornaments, utensils
3	Duralumin	Aluminium 95%, Copper 4%, Manganese 0.5%	In making aeroplane and ship, etc.