The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10-16 m2.S-1 and it is 1.94 × 10-14 m2.S-1 at 1200 K. The activation energy (in k.J.mole-1) for the diffusion of Ni in Cu is
A. 130
B. 180
C. 230
D. 250
Answer: Option C
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