Question
Download Solution PDFWhich of the following is NOT an alloy?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2 i.e. Silver.
Concept:
Alloy:
- A metal made by combining two or more metals to obtain few desirable qualities such as more strength, resistance to corrosion.
- Some Properties of metals for which they are widely used are because they have-
- High melting points.
- Good conductors of electricity.
- Good conductors of heat.
- High density.
- Malleability.
- Ductility
Explanation:
Few examples of alloys, their composition, and their uses are as follows:
|
Alloy |
Composition |
Uses |
|
Steel |
Fe, C |
In ships, bridges |
|
Cupronickel |
Cu, Ni |
In making coins |
|
Brass |
Cu, Zn |
Ornaments, Electrical wiring |
|
Bronze |
Cu, Sn |
Medals, Swords, statues |
|
Solder |
Pb, Sn |
Joining metals |
- Solder, brass, and bronze are alloys but silver is pure metal.
Hence, silver is NOT an alloy.
Additional Information
Amalgam
- Amalgam is an alloy of mercury and one or more other metals likes silver, tin, copper and zinc etc.
- Amalgams are crystalline in structure, except mercury which is liquid.
- An amalgam of silver and tin, with minor amounts of copper and zinc, is used to fill teeth.
- A sodium amalgam is formed during the manufacture of chlorine and sodium hydroxide by the electrolysis of brine in cells wherein a stream of mercury constitutes the negative electrode.
- The reaction of the amalgam with water produces a solution of sodium hydroxide and regenerates the mercury for reuse.
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