Solder Is a Fusible Metal Alloy That Is Used to Join

question 104

Multiple Choice

Solder is a fusible metal alloy that is used to join together metal wires or work pieces.Old-style solder was often 60% tin( r = 140 pm) and 40% lead (r = 154 pm) .Heating the solder caused it to melt; upon cooling, small sites would develop that were richer in Pb, which has a higher melting point than Sn. Cooled solder is thus best classified as

• A)a homogeneous alloy.
• B)a heterogeneous alloy.
• C)an interstitial alloy.
• D)a colloidal alloy.
• E)an intermetallic compound.

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