Which of the following terms refers to intentionally adding impurities to a meta

Question

Which of the following terms refers to intentionally adding impurities to a metal? [a]. Alloying [b] Allotroping [c] Doping [d] Carburizing [e] Solutionizing Which of the following classification of polymer is most likely to harden upon heating, while further heating will not lead to softening? [a] Thermoset polymers [b] Thermoplastic polymers [c] Copolymers [d] Epoxies [e] Block polymers For a FCC single crystal, which crystallographic plane would have the lowest surface energy? [a] (100) [b] (110) [c] (111) [d] (300)

Explanation / Answer

A7. Intentionally introducing impurities to a metal: doping

A8. Thermosetting polymers, harden upon heating, while further heating will not lead to softening.

A9. For FCC crystal: the surface energy of (110) > the surface energy of (100) > the surface energy of (111)

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