Choose the correct option: Which factor most strongly governs whether

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Module 2: Alloys and Phase Diagrams

20252m

Choose the correct option:

Which factor most strongly governs whether a substitutional solid solution forms between metals A and B?

(i) Large electronegativity difference between A and B
(ii) Similar atomic radii and crystal structures with high mutual solubility
(iii) Presence of small interstitial atoms like C or N
(iv) High melting point of the solvent metal alone

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