Which metal has highest malleability from the following?

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ISRO SAC Technician B Fitter 21 Oct 2018 Official Paper
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  1. Copper
  2. Platinum
  3. Aluminium
  4. Gold

Answer (Detailed Solution Below)

Option 4 : Gold
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Detailed Solution

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Explanation:

Mechanical properties:

The mechanical properties of a metal are:

  • Ductility
  • Malleability
  • Hardness
  • Brittleness
  • Toughness
  • Tenacity
  • Elasticity

Malleability:

  • Malleability is the property of a material to permanently extend in all directions without rupture by hammering, rolling, etc. to change its size and shape.
  • These are the materials that can be converted into thin sheets by hammering them or by rolling them.
  • Of all materials that exist on earth, the one which has got the most malleability property is metals.
  • A few examples of the most malleable metals are silver, aluminum, tin, platinum, zinc, iron, lead, copper, nickel, and gold.
  • Among these, gold is said to be more malleable as it can be hammered to a thickness of 0.0025 mm.
  • 1 gram of gold can be beaten into a sheet that spreads across an area of 1 m2.
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