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Medical Science
MEDIUM
ENGLISH
Medical Science
Greening occuring when porcelains are fired on silver free alloys may be attributed to________________?
Vaporization of silver from the walls of contaminated furnaces
Correct answer
B
Surface diffusion of silver from the marginal metal
Option B
C
More rapid silver diffusion in sodium containing glass
Option C
D
Silver ionization by porcelains with high oxygen potential
Option D
Correct answer: A
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