Multiple choice

When the temperature of a solid metal increases,

  1. strength of the metal decreases but ductility increases

  2. both strength and ductility of the metal decrease

  3. both strength and ductility of the metal increase

  4. strength of the metal increases but ductility decreases
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A Correct answer
Explanation

When the temperature of a solid metal increases, its intramolecular bonds are brake and strength of solid metal decreases. Due to decrease its strength, the elongation of the metal increases, when we apply the load i.e.ductility increases.

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