

MCQOPTIONS
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1. |
Which among the following cannot exist in local equilibrium with solder enriched with Bi at 200 degree Celsius? |
A. | Cu<sub>6</sub>Sn<sub>5</sub> |
B. | Cu<sub>3</sub>Sn |
C. | Cu<sub>9</sub>Sn<sub>5</sub> |
D. | CuSn<sub>7</sub> |
Answer» D. CuSn<sub>7</sub> | |