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9. | Which of the following affects the elasticity of a substance? | |
A. | Hammering and annealing | |
B. | Change in temperature | |
C. | Impurity in substance | |
D. | All of the mentioned | |
Answer: Option D | |
Explanation: | |
All the factors change in temperature, hammering and annealing and impurity in substance affects the elasticity of a substance. |
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