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Which outcome results when high concentrations of hydrogen diffuse through palladium?

A)Lattice expansion causes embrittlement
B)Increased electrical conductivity occurs
C)Catalytic activity decreases slowly
D)Melting point increases linearly

💡 Explanation

High hydrogen concentration causes hydrogen embrittlement because hydrogen atoms occupy interstitial sites, leading to lattice expansion creating dislocations; therefore the material weakens and becomes brittle, rather than the alternative of conductivity increases under hydrogenation.

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